648605

Furuno WMB-3250 Wassp Manual

56
Zoom out
Zoom in
Previous page
1/62
Next page
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
… 56 …


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Furuno WMB-3250 Wassp at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Furuno WMB-3250 Wassp in the language / languages: English as an attachment in your email.

The manual is 10,53 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info