Installation manual

Simrad SH80
142
851--164300 / C
Trawl systems
The SH80 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 SH80 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 t o 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