Simrad ITI Manuale Utente Scaricare il pdf (Pagina 27)

Instruction manual

857-164777 / A

$PSIMMW,xxxx.x,M,xxxx.x,M,yyy.y,T,z.z,M,y.y,D,c,hhmmss*hh<cr><lf>

xxxx.x,M slant range in metres to middle weight (clump)

- filtered values.

xxxx.x,M horizontal range in metres to middle weight

- unfiltered values

- nullfields if depth-sensor not activated (will calculate

horizontal range with manual set depth).

yyy.y,T true bearing (deg.rel.north) to middle weight

- requires gyro input for reliable data.

z.z,M signed deviation in metres (if deviation positive, then middle

weight furt her out than door-door line)

- an offset to the deviation may be set inthe trawl setup in order

toget the deviation nearzerowhen the trawlgeometryisideal.

A positive offset will shorten the mid weight wire

- a mid weight filter, filtering the signed deviation, is found in

the trawl setup.

About the mid weight filter:

- the mw filter calculates from unfiltered horizontal ranges for

mw filter setting of 1 to 5 and if active depth sensor on trawl

- the mw filter calculates from filtered horizontal ranges for

mw filter setting of 6 to 10 and active depth sensor on trawl

- the mw filter calculates from filtered slant ranges if no active

depth sensor on trawl.

y.y,D “starboard angle” between true GPS course (or heading if no

GPS) and the “ Door-Door Li ne” of the trawl (0° < y.y < 180°).

c status of data, primarily middle weight deviation status

A: OK

B: OK but ambiguous

(± on deviation, presented range complies with positive

deviation, i.e. the larger range possibility)

C: Uncertain (angle based calculations)

D: Uncertain and ambiguous

E: Invalid data, required sensors not active

V: Invalid data, throw away

W: Invalid and am biguous.

hhmmss time of transmission

(time of Middle weight deviation calculations)

- requires ZDA input from GPS for accurate timestamP.

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Simrad ITI Manuale Utente Pagina 27