User’s Manual INNOMAR Parametric Sub-Bottom Profilers / SESWIN 71
Innomar Technologie GmbH (2023-01) 71
Vessel motions considered:
Heave: positive going down
Roll: positive port up
Pitch: positive bow up
Locations of interest for lever arms:
CG: vessel centre of gravity
(centre of rotation)
MS: motion sensor reference point
MP: monitoring point
(centre of transducer’s face)
Input: The motion sensor data can be received either
on a serial (RS232) or a UDP interface. For the RS232
port the baud rate needs to be defined whereas the
UDP needs a port number. If you need to know the IP
address, this can be checked or altered in the “Config
Network” menu item.
Several data formats are supported. A brief description of the selected data formats is given in
the “Format Description” box. you have to set the baudrate, all other port parameters are fix.
!
Motion data are usually not going to the data acquisition PC and are therefore not visible
from Windows. The data are received by an internal micro-controller. For UDP this
controller has to be in the correct IP address range (System Setup – Config Network), see
section 5.11.18 on page 77.
Heave Correction
Compensation OFF: no heave compensation of the displayed data but the data from the motion
sensor will be stored together with the echo data.
Compensation ON: the echo data will be displayed heave-corrected, but both the echo data and
the data from the motion sensor will be stored separately.
Curve plot overlay: The heave motion will be shown on the display as a line (curve) in the echo
print. In this case online heave compensation does not take place, but heave data is stored within
the data files for post-processing.
Ignore Instable Flag: if checked, all motion sensor values are recorded and used, even if the
motion sensor labels the data sent to being incorrect. Usually only “stable” data should be used.
If checked, the motion sensor LED in the SESWIN status bar is encircled yellow to indicate this
potentially dangerous setting.
Factor / Sign: sets a scale factor for the heave data; a factor of “-1” may be used to invert the
sign.
Lever Arm Correction: switch on/off the lever arm correction as defined below.
Roll/Pitch Correction
Roll correction (electronic beam stabilization) is for the INNOMAR “standard” and “medium-100”
models only.
Pitch correction is (optionally) available for the INNOMAR “medium-70” and “deep-xx” models only.
Roll/Pitch Offset: You may apply an additional static angle offset to correct alignment errors
between motion sensor and transducer. Let’s consider two cases:
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