Bedienungsanleitung Furuno WMB-3250 Wassp (Seite 56 von 62) (Englisch)

648605

Zoom out

Zoom in

Vorherige Seite

1/62

Nächste Seite

Doc. P/N: WSP-009-004

Version: V1.3

Issue Date: August 2013

www.wassp.com

Page 56 of 62

Operator Manual

noise it may not be possible to automatically resume seaoor tracking.

Power

– If too much power is being used for the depth of water you are operating in, the

seaoor tracking signal could be noisy especially if there is enough power to cause signal

distortion, as the tracking algorithm may track the rings produced by this. Conversely, too low a

power level may result in the signal levels from the seaoor being below the noise oor of the

system and thus they will be ignored as noise. This will tend to cause the surface noise to be

considered as a bottom detection candidate.

Depth

– The WASSP system can acquire a seaoor prole swath 3.5 times the nadir depth

but this requires the acquisition depth to be at least twice that of the maximum depth on that

swath. WASSP takes this into account so when the Depth Dial reads 100m, the system acquires

to 210m. If the acquisition depth is in manual mode or the system fails to track down with the

seaoor then you may need to manually increase the system range to allow it to re acquire the

seaoor.

GPS Position

– If there is no position the WASSP system will not output depth data and will

cease to map the seaoor.

Minimisation

– The seaoor tracking is affected by the Minimisation level; ensure this is set

appropriately as described in the Installation Manual.

7.8 Why doesn’t the seaoor line up when I go over it again?

There are several factors which can cause this to show on your WASSP display however

remember that if the vessel is operating in a high sea state, your motion sensor may not be able

to fully compensate for the vessel’s movement:

GPS Time Lag

– Ensure that any GPS delay is entered into the Ship Setup Conguration as this

will cause large errors in depth. See section “10.2.6 Sea Trial - Commissioning Step 13 : GPS

Time Delay (Required)” on page 54 of the Installation Manual.

Motion Compensation

– To make good use of motion compensation we must ensure that the

WASSP transducer and any Motion sensors are securely mounted and do not move at all. The

dynamic and static accuracy of the motion sensor effectively determines the differences you can

expect when you pass over the same area again.

Sea State

– Motion Compensation is a complex process and makes some assumptions – the

bigger the sea state and the smaller the boat the less reliable the seaoor data will be as there

is more reliance on the accuracy of measurements and the input from the motion sensors.

Cornering

– Motion compensation is costly to do to the nth degree. Most low end Motion

sensors have poor performance on corners due to the centripetal acceleration forces caused by

a turn affecting the delicate balance of the sensor. Thus seaoor detections collected while the

boat is turning are likely to be of lesser quality than those collected in a straight line.

Water Temperature – The water temperature and salinity affect the sound speed and thus the

angle at which the sound moves through the water column. This causes the seaoor to curve

up or down as noted in the operator manual. If the seaoor exhibits a curve up or down on the

edges, adjust the sound speed. Note: The surface water temperature will probably change

during the course of a day.

Tide Correction

– Tide is essential for matching up overlapping swaths. If you have disabled

the Tide correction the swaths will rarely line up on your WASSP displays. Ensure that the ZDA

sentence is being collected and sent to the WASSP computer so it can determine the UTC time

and use the correct tide correction value.

Transducer Offsets

– The transducer, GPS and draft offsets need to be input into the WASSP

ship setup conguration so that the motion induced errors in the seaoor can be correctly

Missbrauch melden von Frage und/oder Antwort

Libble nimmt den Missbrauch seiner Dienste sehr ernst. Wir setzen uns dafür ein, derartige Missbrauchsfälle gemäß den Gesetzen Ihres Heimatlandes zu behandeln. Wenn Sie eine Meldung übermitteln, überprüfen wir Ihre Informationen und ergreifen entsprechende Maßnahmen. Wir melden uns nur dann wieder bei Ihnen, wenn wir weitere Einzelheiten wissen müssen oder weitere Informationen für Sie haben.

Furuno WMB-3250 Wassp Seite 56

Brauchen Sie Hilfe? Stellen Sie Ihre Frage.

Missbrauch melden von Frage und/oder Antwort

Art des Missbrauchs:

Forenregeln

Neu registrieren

Das Handbuch wird per E-Mail gesendet. Überprüfen Sie ihre E-Mail.

Ihre Frage wurde zu diesem Forum hinzugefügt

Info