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VisualSMP Users Manual
Users should be aware that when using fixed file formats, integers must be keyed at the
correct location, i.e., right justified within their specified fields. Floating point (real) numbers and
character information may be placed anywhere within the specified fields (unless otherwise
indicated in the data record sets).
The reference system, which is used for input data to SMP is illustrated in Figure
4-1. The origin (station 0) for this system is defined as the intersection of the ship’s forward
perpendicular and Station 20.0 defined at the aft perpendicular. The y-coordinate of this system
is measured from the ship’s centerline with y positive to port. The z-coordinate of this system is
measured from the ship’s baseline with z positive up. The units of y and z must be the same, but
can be expressed in either feet or meters.
y- axis
FP / z- axis
Waterline
x-axis
x- axis
Origin
This reference system is used to define the input values for the underwater hull
geometry, hull and loading particulars, appendage information, and point locations at which
motions are computed.
Record Set Description
This particular section on the description of the record sets is an illustrative
formulation on how to prepare a regular wave input file. It is an important section to which the
user should constantly refer before running a ship through regular wave module. Thus, careful
reading of this section is highly recommended.
Note that each data record set is made up of one or more records. Any specific
data record set that should not be used is represented by a blank record. It should also be noted
that some records within a data record set may be eliminated or skipped, depending on the user’s
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