(41C) Sea Surveying Probability

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An excerpt from Sea Surveying a probability model, International Hydrographic Review, LX (2), July 1983, pgs. 47-53

                                               SUMMARY
       The ambition to optimize all hydrographic work has today become very
important. This is the logical outcome of the increased demand for closely spaced
lines of soundings and the high cost of all operational work. This probability model
is presented in order to make planning easier and analysing of the surveying
operations more accurate. To the best of my knowledge such a model has never
been constructed. By introducing some of the variable parameters in hydrographic
surveying into the model a probabilistic analysis is achieved.

Background
…
Influencing parameters
…
The model parameters
…
Construction of the model
…
Using the model
         The model can be used in various ways and for different purposes. To
facilitate the use of the model, a program has been written for the HP-41 pocket
calculator. Figures 4 and 5 show the flow chart and the program lines respectively.
By introducing the known values of performed surveys, analyses can be
made. For planning purposes, the model can be used to establish the optimal mode
of operation, parallel or crossing line patterns. It can be used to establish the
optimal spacing between the lines for complete coverage or for a certain value of
m. The effects of altering the beam angle can be studied together with a lot of other
things.
                                             CONCLUSIONS
       This model should be a valuable tool for all hydrographic work. To meet
future demands the model could be refined as indicated earlier. The model could
also easily be re-arranged so that the spacing s could be given as a function of the
other parameters including the chosen probability m.
                                             FIG. 4 {flowchart}
                             SSP - SEA SURVEYING PROBABILITY
                                  FIG. 5 {HP-41C program listing}
       By a proper use of the model, the cost of hydrographic surveying could be
diminished and/or the efficiency increased. It is the hope of the author that this
model will help hydrographic surveyors to optimize their work in the best possible
way.

BEST!
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