Kongsberg Simrad SN90 Reference Manual page 569

This means that blank characters are inserted into the datagram. You may also
specify two characters that identifies the SN90 system as the "sender". In most
cases, you will only need to define a Talker ID if your receiving system needs it
for a specific purpose.
Example
$ESDBT,x.x,f,y.y,M,z.z,F*hh<CR><LF>
In this NMEA depth datagram, the Talker ID is "ES", which means
"echo sounder".
Tip
If you do not have a computer keyboard connected to your SN90 system, select the
button to open an on-screen keyboard.
Keyboard
Offsets
The physical location of each sensor must be defined with reference to the vessel's
coordinate system.
The position of certain sensors must be defined as an offset to the Ship Origin in the
coordinate system to maximize performance. These offset values are all required to
allow the SN90 system to give you as accurate information as possible. The degree
of accuracy offered by the SN90 system is directly related to the accuracy of the
information you enter on the
X Offset
Select the offset value on the X axis (fore-and-aft direction) from the Ship
Origin. Adjust with a positive value for X if the sensor is located ahead of
the ship origin.
Y Offset
Select the offset value on the Y axis (athwartship) from the Ship Origin.
Adjust with a positive value for Y if the sensor is located on the starboard
side of the ship origin.
Z Offset
Select the offset value on the Z axis (vertical) from the Ship Origin. Adjust
with a positive value for Z if the sensor is located under the ship origin.
Rotation
For some sensors - typically motion sensors and transducers – the physical location
of the sensor is not sufficient to extract accurate data. These sensors are installed
with physical angles. These angles are often referred to as "installation angles"
or "offset angles". The sensor can be rotated around the three axis of the vessel
coordinate system.
• Rotation Around X(Roll)
• Rotation Around Y(Pitch)
381294/E
Installation Parameters
Functions and dialog boxes
pages.
567