Installation Instructions

External GPS | NSS Installation Manual

Echosounder setup

Select echosounder source

Choose the Echosounder source in the Echo Settings . MENU > MENU > ECHO.

This can be selected to be the echosounder built in to the display (NSS7 and NSS8 only), or an

external sounder module such as the BSM-1.

Deselecting the Network Echosounder option, limits source selection to internal sonar only.

Depth o set

This is a value that can be entered on the Echo Installation page to make depth readings

relate to any point from the water surface, to the deepest point of the vessel.

Below are some typical ways in which the o set is used:

A) For Depth below Keel: Set the distance from transducer to the keel.

Enter a negative value, e.g.

B) For Depth Below Transducer: no o set required.

C) For Depth Below Surface (waterline): Set the distance from transducer to the surface:

Enter a positive value., e.g.

AB C

Echosounder software version

For external sounder modules, the software version is displayed under Sonar installation. To

upgrade Sonar software, see page 49

Water speed calibration (Echosounder transducer)

Water speed calibration is used to adjust the speed value from the paddle wheel to match the

actual boat speed through the water. Actual speed can be determined from GPS speed over

ground (SOG) or by timing the boat over a known distance. Water speed calibration should be

performed in calm conditions, with minimal wind and current movement.

Select Auto correct to match water speed to ground speed (SOG).

Manual calculation. Increase this value above 100% if the paddle wheel is under reading, and

decrease this value if it is overreading, e.g. if the average water speed reads 8.5 knots and SOG

records 10 knots the calibration value needs to be increased to 117%. To calculate the adjust-

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