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Supported datagram formats for heading information
The FM90 supports the following datagram format for vessel heading and/or gyro
information.
•
NMEA HDG
The NMEA HDG datagram provides heading from a magnetic sensor. If this reading is
corrected for deviation it produces the magnetic heading. If it is offset by variation, it
provides the true heading.
•
NMEA HDM
The NMEA HDM datagram provides vessel heading in degrees magnetic. The datagram
format is no longer recommended for use in new designs. It is often replaced by the
NMEA HDG telegram.
•
NMEA HDT
The NMEA HDT datagram provides the true vessel heading. The information is normally
provided by a course gyro.
Performance specifications
These performance specifications summarize the main functional and operational
characteristics of the FM90 system.
•
Operating Frequency
: 200kHz
•
Beamwidth
: 3° x 20°
•
Number of beams
: 256
•
Swath
: 240° x 20°
•
Internal Sensors
: Depth, Temperature, Pitch and Roll
•
Acoustic Sensors
: PI/PX 40kHz band
•
TVG setting
: Selectable, 20,30, 40 and user log
•
Input/Output data
: NMEA format
•
Depth Rating
: 2000 m
Summary of Contents for FM90
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