Marport Scala2, User Manual

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Scala2 | Version 5 | Appendix
Type of gear X, YY, ZZZ, TTT
P,SD,78,XST Distance between port clump
and starboard door
P,SD,78,XCL Distance between port clump
and starboard clump
Triple trawl with port (the
master is on the port clump)
P,SD,78,XPT Distance between port clump
and port door
Positioning sentences
Scala2 can output NMEA data for trawl door positioning with the following sentences:
• $PSIMS (Olex)
• $PTSAL (MaxSea version 12 and SeaPix)
• $PMPT (TimeZero)
• $IIGLL (MaxSea version 12, single position sentence)
• $IITPT (Simrad, single position sentence)
These are examples of PSMIS, PTSAL and IITPT sentences:
$PSIMSn,aaa,M,bbb,M,ccc.c,T,ddd.d,M, hhmmss*hh<cr><lf>
• $PSIMS : talker iden sentence formatter
• n : 1 = Spread1 (port trawl door when Twin Rig) / 2 = Spread2 (starboard trawl door when Twin
Rig).
• aaa,M : slant range to sensor, in meters (filtered values, no decimals).
•
bbb,M : horizontal range to sensor, in meters (unfiltered values, no decimals). Transmits null
fields if depth-sensor is not activated (will calculate horizontal range with manual set depth).
• ccc.c,T : true bearing (deg.rel.north) to sensor. Requires gyro input for reliable data.
• ddd.d,M : spread measurement in meters (door to door or door to clump). Transmits null fields if
invalid values. Filtered values if sensor's filter is on.
• hhmmss : time of transmission (time of Spread interrogation). Requires ZDA input from GPS for
accurate timestamp.
• *hh : checksum
$PTSAL,aaa.a,bbb.b,ccc.c, ddd.d,eee.e,fff.f*hh <cr><lf>
• $PTSAL : talker iden sentence formatter
• aaa.a : horizontal range in meters to sensor 1
• bbb.b : horizontal range in meters to sensor 2
• ccc.c : bearing to sensor 1 relative to stern line
• ddd.d : bearing to sensor 2 relative to stern line
• eee.e : depth in meters of sensor 1
• fff.f : depth in meters of sensor 2
• *hh : checksum
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