Simrad SP90 - REV E, Installation Manual

Page: 185 / 232

Technical specifications
173
851-164510 / Rev.E
Trawl systems
The SP90 interfaces a trawl system via Ethernet or on a serial
line. The serial interface uses either the NMEA 0183 standard,
or Simrad’s version of it. In the Simrad version of NMEA
telegrams, the Start Of Sentence delimiter
$ is replaced with @ .
The following trawl systems are interfaced: ITI, FS900 and
FS3300.
Note:
Other telegrams than trawl may be received from the ITI, since
this system may be used as a telegram router.
ITI Inputs
The SP90 can receive the following trawl telegrams from the
ITI system.
•
Trawl position true vessel
•
Trawl position in cartesian co-ordinates
•
Trawl position in latitude and longitude
•
Depth of trawl below surface
•
Water temperature at the trawl
•
Trawl headrope to footrope and bottom
•
Trawl door spread
•
Trawl spread 2
•
Trawl filling
•
Trawl to shoal distance
•
Heading, magnetic
•
Heading, true
Trawl position true vessel
@IITPT,x,M,y,P,z.z,M<cr><lf>
where (from left towards right):
Component Content
TPT True trawl position relative to the vessel
x,M Horizontal range to the target
y,P Ttrue bearing to the target
z.z,M Depth of trawl below the surface