Kongsberg Simrad MF90, Installation Manual

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Speed log requirement
In order to operate correctly, the MF90 system requires input from a speed log. Unless
specified in the contract, a speed log is not a part of the MF90 system delivery. Provided
that a speed log sensor is interfaced to the MF90 system, the vessel’s current speed can
be presented in the user interface.
Note
Without speed information, the MF90 system will neither be able to present correct
navigational information, nor compensate for vessel movements. This lack of compensation
will prevent the system from providing correct echo information.
In most cases a suitable sensor is already installed on the vessel. A global positioning system
(GPS) with a compatible output format can also be used.
Related topics
Simrad MF90, page 13
Additional required and optional items, page 28
Course gyro requirement
In order to operate correctly, the MF90 system requires input from a course gyro. A course
gyro is not a part of the MF90 delivery. When a course gyro is connected to the MF90, the
vessel’s current heading can be presented in the user interface.
Without the input from a course gyro, the MF90 system will not be able to present correct
navigational information. In most cases a suitable course gyro is already installed on the
vessel.
Note
Most global positioning system (GPS) can provide course information, but this data is
generally too inconsistent to provide a stable presentation on the MF90 system. This
inconsistency is especially noticeable at low vessel speeds. Incorrect course information can
then result in settings not working properly.
We recommend that you use a satellite compass or a gyro compass.
Related topics
Simrad MF90, page 13
Additional required and optional items, page 28
Simrad MF90