Doc. P/N: WSP-009-005
Version: V1.5
Issue Date: October 2013
www.wassp.com
Page 49 of 73
Installation Manual
Figure 45. Swap Roll Check Box
10.2 Sea Trials
The second part of the commissioning procedures requires taking the vessel on a short sea trial.
This requires the vessel to leave the dock and perform some basic manoeuvres. The deeper the
water the more accurate the tests can be. Ideally, this would be at least 20 metres of water.
10.2.1 Sea Trial - Commissioning Step 8: Ensuring Correct Transducer Orientation
With the WASSP running and displaying the sonar view, determine if the right side of the sonar display
shows topography that is on the starboard side of the vessel.
If you are unsure of the nature of the seafloor you will need to find a feature such as a rock, bank
or significantly sloped sea profile. Use the waterfall view to navigate and cross your own track in
opposite directions over this feature. If the sonar display seems incorrect (i.e. the bank appears to
be sloping in the wrong direction), then there is a likelihood that the
transducer has been installed
incorrectly
, and is wrongly pointed toward the stern of the vessel.
10.2.2 Sea Trial - Commissioning Step 9 : Roll Correction Polarity
Watch the
sonar
view carefully when the vessel is subject to some roll. If the roll polarity is
correct the seafloor shown on the
sonar
view should stay steady as the vessel rolls. If the roll
polarity is not correct, the roll of the
sonar
display will double what is actually present. If you are
unsure, compare the results with the
Swap Roll
check box selected and then de-selected.
Note down the correct polarity value below and leave the
Swap Roll
check box in that state.
Swap Roll Check Box
Swap Roll:
e
naBled
d
isaBled
(Circle one)
