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1 INTRODUCTION
The extraordinary achievements and acceleration of
science (and therefore technology) began essentially in
the 17th century with the introduction of the
mathematical-empirical method by I. Newton. The
extremely rapid development of science was caused by
methodological self-limitation: philosophical
questions of "why" were no longer asked; scientists
were only interested in "how" (with mathematical
description). This self-limitation is imperceptible if we
are far from the borders of science (I mean engineering
sciences). The development of science has led to the
creation of extremely powerful tools that approximate
reality, which have been called "artificial intelligence".
The AI tool can be used in applications close to the
classical borders of technical sciences. For this reason,
it seems worth considering the basics of this field of
science, especially since its application may affect
safety. One application of artificial intelligence may be
the introduction and improvement of autonomous
shipping. However, the safety of navigation depends
on the accuracy of the predictions approximations of
the adopted mathematical model. The analysed
phenomena should be simplified as much as possible,
but in such a way that the resulting models give correct
predictions of experimental results. A scientist or
engineer should be aware of the limitations and scope
of application of a given model. Modelling of processes
and physical phenomena is so common in engineering
practice that it is often unnoticeable. Fully realizing
that the most accurate model is not a physical reality -
it has its limitations - is extremely important when
analysing various engineering issues. The comparison
of a photo of a real ship under construction (Fig. 1) with
its exact model for calculating the global vibrations of
the hull and superstructure of the ship (Fig. 2) shows
the fundamental differences between a physical object
and its model. In many cases, the complete
computation process from modelling a physical object
Autonomous Navigation Safety in the Light
of the Limitations of Necessary AI-based Predictions
L. Murawski
Gdynia Maritime University, Gdynia, Poland
ABSTRACT: The development of science has led to the creation of powerful tools that approximate reality, which
have been called "artificial intelligence". One application of AI may be the introduction and improvement of
autonomous shipping. The safety of navigation depends on the accuracy of the predictions approximations of
the adopted mathematical model. This paper presents the basic threats related to the approximation used by AI
and the lack of distinction between interpolation and extrapolation. Selected barriers in modelling physical objects
related to the basic assumptions of our science, which commonly uses infinities and continuity of mathematical
functions, were also considered. The extensiveness of necessary, further research that should be conducted was
signalled, the aim of which should be to precisely identify the limitations of the extremely powerful and useful
tool that is artificial intelligence. The safety of the processes (e.g. autonomous shipping) to which it will be applied
depends on this.
http://www.transnav.eu
the International Journal
on Marine Navigation
and Safety of Sea Transportation
Volume 19
Number 3
September 2025
DOI: 10.12716/1001.19.03.11
788
through a mathematical model to numerical
calculations is not fully understood. At each stage of
this process we introduce some approximations
inaccuracies; even when we use a tool for
approximation that has been (rather unfortunately)
called artificial intelligence (the first computers were
called electronic brains).
Figure 1. Container ship with a capacity of 2000 TEU [1]
Figure 2. FEM model of a container ship with a capacity of
2000 TEU based on Patran-Nastran software [1]
This paper presents the basic threats related to the
approximation used by AI and the lack of distinction
between interpolation and extrapolation (especially in
dynamic and nonlinear processes). Selected barriers in
modelling physical objects related to the basic
assumptions of our science, which commonly uses
infinities (e.g. infinitesimal numbers differential
calculus) and continuity of mathematical functions,
were also considered. The limitations of the extremely
powerful and useful tool that is artificial intelligence
should be identified. The safety of the processes to
which it will be applied depends on this; our area of
interest is autonomous shipping.
2 CRITICISM IN SCIENTIFIC RESEARCH
METHODS
Criticism is necessary to break the existing scientific
certainties - constant questions about the basics of
science (or "only" about the basics of one, analysed
issue). Leibniz's question is still open: "why is there
something rather than nothing?". Why does physics
(mechanics) exist and why can it be described with
such simple mathematical formulas (why is the world
mathematical)? In physics, the principle of least action
is a fundamental law of nature. In engineering and
technical sciences, a similar principle should be apply,
but mainly for methodological reasons. The analysed
phenomena should be simplified as much as possible.
Only humans can creatively determine the scope of
applicability of a given theory, its limitations, and its
expected errors. For example, the vast majority of
engineering analyses are based on a model of the world
in which the earth is motionless and flat (!). Because in
most cases we do not take into account the forces
associated with the movement of the earth (sun,
galaxy, local galactic cluster...) such as gyroscopic or
centrifugal forces. The assumption of earth flatness
results from the assumption of parallel forces of gravity
of individual parts of the body, while determining its
centre of gravity. It can be said with some exaggeration
that the Copernican revolution did not reach
engineering. It is definitely a correct (optimal)
approach (simplification) but the engineer cannot
forget that he uses only the model of reality, which has
its limitations - the scope of applicability.
Mathematical - empirical research method is the
inseparable whole [2, 3]. It is not possible to separate
individual parts from it, we can only talk about the
mathematical and empirical aspect of a given method
with some simplification. The mathematical aspect
seems to be connected with our mental cognition,
while the measuring aspect with our sensual cognition.
However, it is a simplification, because there are
numerous correlations between both aspects. After all,
in the simplest measurement (e.g. the diameter of a
shaft with the use of a caliper) it is necessary to process
it mentally. There is a common belief among engineers,
which is well expressed by the travesty of Albert
Einstein's saying: “No one believes in calculations
except the person who made it, everyone believes in
measurements except the person who made it”. In the
light of the analysis of the methodology of modern
science this belief should be verified. Not only
computational analyses are burdened with a number
of errors, but also measurement research is not free of
them. What is more, if we have a wrong theory
(hypothesis), the experiment will "search" for
quantities that do not exist.... and will often find them
(if we don't approach it critically enough). Limited
trust (criticism) should be the basis of every engineer's
work, but not artificial intelligence. In all types of
research, it should be remembered that the quality of a
given mathematical model is not an absolute quantity.
It depends on the purpose for which the model is to be
used. For example, a crankshaft model for calculating
torsional vibration is useless for assessing its strength.
3 APPROXIMATIONS IN ENGINEERING
In the light of modern research, the physical world is
non-linear and dynamic in states far from being
balanced. However, most engineering problems are
linearly modelled as static or quasi-static phenomena.
This approach is useful and optimal, but the limitations
of such models must not be forgotten. One way to
avoid thick modelling errors in dynamic and/or non-
linear phenomena by linear systems is to use a
sentence: “Extrapolation should be prohibited in
engineering research, only interpolation is allowed”.
This is certainly way too much simplification.
Nevertheless, it is worth remembering it in order to use
the extrapolation of the obtained results (especially the
measurement results) with great caution (e.g. unusual
maritime events during autonomous navigation).
Let us assume that we are researching a certain
physical phenomenon about which we do not have too
strong theoretical foundations (the mathematical
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model is poorly developed). But according to Einstein's
saying, a good measurement should be enough to
recognize the problem. Let us additionally assume that
we are able to carry out measurement tests with a very
small, almost negligible measurement error. Let's
assume that vibrations of a given object are a problem.
So we carry out a series of measurements of amplitudes
(displacements, velocities or accelerations) of
vibrations as a function of the forces frequency. The
results of such measurements are marked with red
stars in Fig. 3 (all further simulations were performed
in Matlab). In order to predict the behaviour of the
object for the frequency of excitation different from the
measurement (it is impossible to carry out
measurements for all frequencies, because it is
impossible to carry out infinite number of
measurements) it is necessary to introduce some
mathematical model. If we are interested in the
response of the structure to extortion with a frequency
within the measured area (1-7 Hz), then the simplest
mathematical model is to use interpolation of the
measurement results. It can be observed that even the
simplest linear interpolation gives predictions with
acceptable errors in relation to the "real" behaviour of
the object (black colour - an exact mathematical model).
The higher the degree of the interpolation curve, the
lower the error rate. Despite this, it should be
emphasized that even carrying out "error-free"
measurements gives results with a certain dispersion.
Figure 3. Interpolation of measurement data
If we believe uncritically in measurements, we can
say that as a result of conducting extremely accurate
empirical research we know everything about the
dynamic behavior of the object. Let us assume that we
are interested in the behavior of the object for the
frequency of forces outside the measurement range: for
10 and 15 Hz. Wanting to rely only on "reality" - on
measurements (without the mathematical part of the
method) we use extrapolation of results of empirical
tests. Fig. 4 shows the extrapolation with different
methods against the background of the behavior of the
object resulting from the commonly known
mathematical model. The resonance curve (continuous
black color) is a well-known phenomenon, well known
on the basis of the mathematical-empirical method. It
can be observed that in case of correct interpolation of
measurement results (within the measurement range)
the errors should not exceed 10%. As a result of
extrapolation, in our example, the errors significantly
exceed even 1000%. At 10 Hz the vibration amplitude
is about 10 mm/s (black line), and the extrapolation
results in values of 2-4 mm/s. However, at 15 Hz the
vibration amplitude is about 1 mm/s, and from
extrapolation we obtain values of the order of 3-13
mm/s. The result of such a measurement (without the
mathematical part of the method) is useless. Moreover,
the error rate is not correlated with the degree of
extrapolation polynomial - a higher degree of
polynomial does not necessarily lead to smaller errors.
This may be the justification for saying that
extrapolation is not allowed for an engineer. It cannot
be assumed that the measured values give us an
absolute truth about the phenomenon. Already at the
level of "pure" empirical measurements some
mathematical model of the phenomenon is necessary.
An engineer must be aware of the fact that he always
uses a given mathematical model, and that each of
them has its own assumptions - limitations. An
example of the lack of common and sufficient
knowledge of the mathematical-empirical method is
the use of genetic algorithms in the so-called artificial
intelligence. From the fact that genetic algorithms to
some extent (rather less than more!) reflect the
evolution and behaviour of the human mind, many
people draw a conclusion about their perfection.
However, these algorithms are a bit more advanced
way of interpolation (acceptable) and extrapolation
(acceptable with great caution) of measurement data.
Figure 4. Extrapolation of measurement data
On the basis of the previous considerations it could
be concluded that if we avoid extrapolation, empirical
research will have an advantage over mathematical
modelling of reality. So it is enough only to extend the
measuring range? Fig. 5 shows the measurement
research in the range of the resonance curve we are
interested in. It was assumed that the measurement
studies are still carried out with extraordinary
accuracy, which makes it possible to ignore
measurement errors. If the resonance curve (marked
with an axial line) describes the torsional vibrations of
the ship's power transmission system, we must be
aware of the fact that most often the continuous
operation of the system in the resonance is
unacceptable (the range of closed revolutions) due to
the strength of the power transmission system. During
measurements the researcher may be subjected to
pressure from engineers - exploiters to leave the
resonance area as soon as possible (limiting the number
of measurement points). For this reason, the number of
measurement points (red stars) shown in Fig. 5 is
realistic. It can be observed that interpolations with
polynomials do not work very well in this type of
physical phenomena. Very often linear interpolation is
used (connection of individual measurement points
with straight lines) - red lines in Fig. 5. Interpolation
with more precise curves (e.g. spline) will not give
much more information. The frequency of occurrence
of vibration resonance will be determined on the basis
of measurements, as equal to 9.5 Hz. While in "reality"
(in the mathematical model) is 10 Hz. The error of very
accurate measurements in this case is 5%. This error
rate is significant when determining the natural
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vibration frequency. The frequency of resonant
vibrations determined by interpolation of
measurements with polynomials and spline lines gives
more accurate results in the case under consideration,
but it is rather a matter of chance. The error rate is not
possible to estimate without the knowledge of physics
of the phenomenon, i.e. the mathematical model.
Figure 5. Measurement data and their interpretation
4 CONFIDENCE LEVEL IN MEASUREMENTS
Until now, unavoidable measurement errors have not
been taken into account. In the case under
consideration, both the natural frequency (abscissa
axis) and the amplitude of the vibrations (ordinate axis)
are determined with some error. For this reason, the
confidence level of measurement studies (used for AI
decision-making, e.g. in autonomous shipping) is
limited. Usually, the vibration frequency is determined
with greater accuracy than the vibration amplitude, as
shown in Fig. 6. From a basic mathematics course it is
known that three points are enough to uniquely
determine a quadratic curve. For the analysis, three
points (the first, fifth and sixth point) of the
measurements presented in Fig. 5 were used, with
additional accepted measurement errors. These errors
were taking at a relatively high level in order to better
illustrate the problem. The measuring points were
connected by a second degree polynomial. The first,
red and continuous curve was determined for the
measurement points without taking into account
measurement errors. Subsequent curves (green, point
and blue, intermittent) were determined for the same
measurement points with randomly selected deviation
values. It can be observed that in engineering practice
(in which it cannot be assumed that there are no
measurement errors) to determine the second degree
curve realistically it is necessary to know at least four
measurement points (!). In the case under
consideration, the measurement of vibration
amplitudes for frequencies of about 5 Hz would define
much more unambiguously the approximation curve
of measurement quantities.
Figure 6. Approximation of research including measurement
errors
After introducing to the research the values of
measurement errors presented in Fig. 5, we obtain a set
of measurement points presented in red in Fig. 7.
Subsequent interpolations made with the use of the
spline function are presented in different colors. The
violet line represents the interpolation with zero
measurement errors, while the green and blue curves
were created for the same measurement points, but
with randomly selected errors. Despite the large
number of measurement points, a large dispersion of
curves can be observed - the results of measurements
in which "everyone believes, except for the measuring
person". Moreover, all these curves are outlying from
the reality (especially around resonance) represented
by the mathematical model as shown in Fig. 7 by the
axial line. Moreover, the measurements may "reveal"
some characteristics of the tested object, which are not
really there! For example, when analysing the blue line
that interpolates the measurement research, we can see
four resonance frequencies. Despite the fact that we
know that we are analysing a system with one degree
of freedom! This phenomenon occurs despite the fact
that all measurement points lie exactly on the
considered resonance curve. In the considered
examples, some phenomena have been consciously
overestimated for teaching purposes, but all the
described errors appear in the measurement practice.
Figure 7. Results of resonance curve research including
measurement errors
5 INFINITIES AS A BARRIERS IN MODELING
PHYSICAL OBJECTS ON THE EXAMPLE OF
PREDICTING THE POSITION OF THE
CRANKSHAFT CRANKS
In our mind, the world is modeled (i.e. approximated,
very often in a linear way) by numbers (mathematical
method), which by their nature are infinite and
continuous. We operate with functions that are almost
universally applied to engineering as continuous
functions. The vast majority of real numbers (infinitely
many times more) have infinite long expansions in the
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decimal system of number writing. In practice, it is
impossible to use infinity (in any sense). For an
engineer to say that an object is 4 m long is not the same
as to say that it is 4.00 m long. The first information says
that the object is between 3.5 m and 4.4 m long, and the
second information gives the information that the
object is 3.995-4.004 long. The accuracy of both
information can of course be developed theoretically
infinitely. This fact, often not realized by an engineer,
has its deep consequences. Even in the nineteenth
century it was assumed that if the laws governing the
world are deterministic, everything (!) is determined
(the problem of free will of man). If we know these laws
and initial conditions, we can determine the state of a
given object, at any past or future moment, with any
accuracy. It is the so-called Laplace's postulate [4, 5]:
"An intellect which at a certain moment would know
all forces that set nature in motion, and all positions of
all items of which nature is composed, if this intellect
were also vast enough to submit these data to analysis,
it would embrace in a single formula the movements of
the greatest bodies of the universe and those of the
tiniest atom; for such an intellect nothing would be
uncertain and the future just like the past would be
present before its eyes..." This reasoning assumes by
default the possibility to determine the initial
conditions in an infinitely precise manner (infinite
expansion of the numbers determining the initial
conditions).
The starting point for Albert Einstein's
revolutionary theory was a statement about the
finiteness of the speed of light (in a simplified way).
The consequences of this simple assumption were
extremely rich (special theory of relativity). Also in the
theory of quantums we find limitations concerning
infinitely small quantities or infinitely precise
determination of physical parameters. Under the
pressure of experimental data, contemporary physics,
both the theory of quantum and the theory of relativity,
resigns from infinity [6]. The smallest and the biggest
sizes of the universe are finite. But for the human the
size of the universe and the smallness of elementary
particles exceeds the capabilities of its mind. The world
in which man lives is suspended between two practical
infinites. Einstein joked: "Two things are infinite: the
universe and human stupidity; but I'm not sure about
the universe." Many years of engineering practice,
along with philosophical considerations, led the author
to make the hypothesis that: “In the physical world,
infinity does not exist in any form”. Which does not
contradict the thesis that mathematics with its infinity
is extremely useful. But it serves only/until to model
the world - an approximate representation of its
structure and phenomena. There are many types of
infinity. Examples of types of infinity, important from
the point of view of modelling in mechanics, are:
infinity of time
limitlessness of space
continuity
infinite divisibility
infinite speed
infinity in mathematics (infinitely small and large
numbers, continuity, real numbers and their infinite
development, the concept of functions, etc.)
An interesting example is the infinity of the
expansion of real numbers, the consequences of which
are presented below crankshaft position analysis. The
whole differential (and therefore integral) calculation
also contains infinity - infinitesimally small quantities,
e.g.: t0. It is known from quantum physics that
time cannot approach zero infinitely. Therefore the
differential calculus is only a rough approximation. It
means that a model of reality to be used with some
caution. An attempt at infinitely precise determination
of the state of the elementary particle (e.g. momentum
and position) encountered the resistance of the basic
nature. Mathematics is now the language of physics
and all sciences. In mathematics, most of the basic
functions can be illustrated by graphs with a curve line
or a set of points (one argument corresponds to one and
only one value of the curve). And yet both a point and
a line contain infinity (infinitely small size or infinitely
small width or continuity). In the physical world, one
argument corresponds to one value, but with a certain
dispersion - the error level. Drawing the function
should be done by means of a line of finite thickness.
What is more, if the argument of the function is time,
and this cannot be infinitely small, then the function
consists of individual points (fuzzy and not infinitely
small) and not a continuous line. Physical space-time is
then distinguishable only with a certain
approximation.
Let us consider the movement of a simple
mechanical object: the rotation of the engine
crankshaft. In the case under consideration, it is the
crankshaft of a 10-cylinder ship's slow-speed engine:
10K98 from MAN B&W. Its FEM model is shown in
Fig. 8. We are interested in the position of a given crank
shaft (Fig. 9) at any time.
Figure 8. Crankshaft of 10-cylinder marine low-speed engine
Figure 9. Position of crankshaft crank
The crankshaft crank are evenly distributed; the
ignition sequence determines the order of the relative
rotation of the throws. In a 10-cylinder engine, the
throws are spaced every 36 degree. We assume that the
shaft speed, which is constant, is known with infinite
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accuracy. Also, time is in the first assumption infinitely
determinable. In this case, the relative position of the
crank is determined by a fully deterministic
relationship: the speed multiplied by time gives the
angle of rotation of the shaft. In order to know the
position of a given throw at any time, we still need to
know the initial conditions: the angle (Fig. 9) at the
t=0 moment. Let us assume, that the initial position of
the crankshaft was determined extremely precisely:
0=36.001°. Such a record means that the initial angle of
rotation of the throw has been determined to an
accuracy of ±0.001°. The actual angular position may be
=36.00149...° or =36.00050...°. The initial angular
position of the shaft can be written in a form:
0=36.001nnnnn...°. Where "n" stands for an unknown
number. After ten ignitions (in each cylinder) the throw
will rotate by 10x36°, it is enough to multiply the
number 0 by ten. In the decimal system it is reduced
to moving the point one position to the right. As a
result of this operation we will obtain:
10=360.01nnnnn...° = 0.01nnnnn...°. The precise
knowledge of the throw position is still high (±0,01°)
but has decreased tenfold! After a thousand ignitions
our knowledge of the crankpin position is reduced to
±1° because: 1000=36001.nnnnn...° = 1.nnnnn...°.
It can be observed that after 10 thousand ignitions
the accuracy of the crank position drops to the value of
±100°, i.e. in practice it is unknown (theoretically a
completely undetermined position occurs after 100
thousand ignitions). It should be stressed that having
ideally deterministic dependencies (with infinitely
accurate parameters of time and rotational speed) we
are not able to determine the searched value after a
sufficient number of cycles of work. If the rotational
speed of the considered engine is n=100 rpm, then for a
10-cylinder engine 100 thousand ignitions will occur
after 10 thousand revolutions, i.e. after 100 minutes.
After about an hour and a half it is impossible to
determine the position of the crank despite the
determination of its initial conditions with a
remarkable accuracy of 0.001. In practice, the situation
of the researcher is even more difficult, because the
engine speed can be determined only with a finite
accuracy, and what is more, the assumption of a
constant speed is also a certain (often coarse)
approximation. Only the error of time determination
can be ignored in engineering practice, because of the
possibility of obtaining a very high accuracy of its
determination.
In order to graphically illustrate the described
phenomenon, a simple procedure of crankshaft crank
position calculation was performed. It was assumed
that the starting throw position, equal to 10°, is
determined with the accuracy of ±0.01°. The next
position is obtained by multiplying the previous
angular position by 10 (due to the ease of operation in
the decimal system) - the subsequent cycles of work are
a tenfold increase in the angle describing the throw
position. Of course, the results obtained above 360° are
reduced to the range of 0-360°. As already shown in the
previous paragraph, each new cycle is a tenfold
reduction in the accuracy of the throw position
determination. The subsequent numerical values of the
angular positions are calculated deterministically, but
their final values have a random scattering equal to the
accuracy of the position determination for the given
calculation cycle. For example, in the second
calculation cycle we have the angular position 100°
with the dispersion of ±0.1°; so for further calculations
the number 99.9° or e.g. the number 100.05° can be
used. Fig. 10 shows an exemplary (due to randomness,
each subsequent calculation will give a different
course) course of changes in the position of throw of
the crankshaft. In order to make the drawing easier to
read, the crank position (navy blue line) is given for
every tenth calculation cycle, while the size of the
position error (red line) is given for every hundredth
calculation cycle. It can be observed that after 2,000
cycles the error rate covers the entire 0-360° range. This
means that the throw position is undetermined.
Figure 10. Position of the crank and its dispersion in
subsequent calculation cycles
The sensitivity of the system to initial conditions is
shown in Fig. 11. The position of the throw of a shaft of
the crankshaft for three starting values has been
calculated. The initial throw position was determined
as 10.00° (continuous blue line), 9.99° (dotted green
line) and 10.01° (dotted brown line). It should be noted
that all lines start from practically the same point, while
the course of throw position changes is random and
drastically different for each initial condition. For
example, for cycle no. 1801 the throw can be deflected
from the vertical by 56° or 286° (for 0=9,99°)) or 114°
(for 0=10,01°).
Figure 11. Sensitivity to the determination of the crank
position to initial conditions
The determination of the throw of a shaft position
with any finite accuracy will not permit the
determination of its angular position after a sufficiently
long time. It should be noted that the above examples
have been prepared for the simplest way of modeling -
linear models. In case of the occurrence of non-
linearities (e.g. geometrical, material), describing
physical phenomena becomes very complicated. In the
descriptions there are bifurcations (jumping change of
properties of a mathematical model with a small
change of its parameters), which lead to the formation
of completely different families of solutions passing
through bifurcation points. The whole of these
phenomena is defined by the term deterministic chaos
[7]. Generally, hypersensitivity to initial conditions
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leads to deterministic chaos, and as it has been shown
it is impossible to determine initial conditions with
infinite accuracy. The difficulty or even impossibility of
predicting the weather forecast for a longer period of
time is caused by deterministic chaos; and in this case
the use of increasingly powerful computers will not
help us. An engineer must remember that despite the
deterministic (expressed in strict mathematical
formulas) laws of nature, the researched and "tamed"
world is not fully determined; many phenomena can
be determined only with a certain (deterministic!)
probability. The non-linear, dynamic world in states far
from equilibrium must, however, be characterized by a
certain order of complexity - a certain self-
organization. In the most complex systems, certain
quantities must be measurable. Otherwise, the
existence of strict sciences would be impossible. It
should be remembered that not always and not all
phenomena can be modelled linearly. The most
complex phenomena are dealt with by such branches
of physics as the theory of dynamic systems,
deterministic chaos or nonlinear thermodynamics.
6 CONCLUSIONS
The aim of this paper is not to systematically present
all measurement errors, confidence levels and/or all
limitations of AI-based predictions. The target is to
make the reader aware of the fact that an engineer
(scientist) operates only a model of reality constructed
with the mathematical-empirical method, in which one
should always be critical (to have a limited level of
trust). The mathematical-empirical method has two, in
principle inseparable members. Both measurements
and calculations can be a source of significant errors
with incomplete understanding of the phenomenon
and errors made during its modelling.
The limitations of our predictions (both empirical
and theoretical) are also evidenced by Gödel's proven
theorem, which was a shock to the 20th century
scientific community. These are basically several
interlinked statements, the most important of which for
our considerations are the non-conflictability claim and
the inconclusive claim. In a simplification, it can be
summarized as follows: "If the system (rich at least like
arithmetic) is complete, it is contradictory, and if it is
not contradictory, it is incomplete". The world
described by physics (mechanics) is certainly richer
than arithmetic. So any model of the world will be
incomplete. An engineer must be aware that not
everything knows. Never, in any even the most
complicated model, we describe the entire physical
phenomena. The aim of further research on
autonomous shipping should precisely identify the
limitations of the extremely powerful and useful tool
that is artificial intelligence. The safety of the processes
to which it will be applied depends on this.
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