NOAA Ship MILLER FREEMAN

Ship Navigation Equipment


Gyro Compass

The ship has a Meridian Standard Gyrocompass stepper and syncro outputs. Heading data is recorded in the ship's Scientific Computer System (SCS), using digital NEMA conversion. Gyro repeaters are located on the bridge and bridge wings, in the trawl house, and in after steering. Gyro information is used by various ship's systems such as the radars, Inmarsat, ADCP, etc. The gyrocompass information is used by the ship's Sperry autopilot system.

GPS

The primary navigation GPS system consists of two Northstar 6000i GPS WAS receivers located on the bridge. The positioning information is used as input for the ship's Nobeltec Visual Navigation Suite, as well as recorded on the SCS system. The data is also available in the Trawl House. A Northstar 951X 12-channel DGPS receiver is located in Dataplot for use with other scientific sensors and is recorded on SCS. DGPS data is also output from the POS/MV system. Backup GPS data can be used from the Furuno GPS Navigator GP-90 on the bridge or the Trimble Inmarsat-C unit and Northstar 941X 12-channel DPGS receivers in the Radio Room.

Electronic Navigation

The ship is currently using Nobeltec's Visual Navigation Suite Version 9 with integrated AIS overlay. Traditional paper charts are used as well.

Radar

The ship has a Furuno X-band (3 cm) radar and a Furuno S Band (10 cm) radar. Both use ARPA and AIS displays. The ARPA display incorporates gyro heading information and GPS position data into the visual display. The AIS display incorporates broadcasted ship's posistion, name and characterists data into the visual display.

Doppler speed log

An Consilium Speed Log provides speed through the water. This information is also available in the Trawl House.

NAVTEX

The receiver is a GMDSS compliant 518 KHz receiver used for receiving and direct printing of weather and marine safety information.

Weather fax

The weather fax receiver is used to receive National Weather Service (NWS) weather products from automated U.S. Coast Guard (USCG) communication stations. USCG stations transmit products from locations in Alaska, Hawall, Guam and California on medium frequency (MF) and high frequency (HF) at scheduled times.


•  Return to Miller Freeman's Home Page
•  Return to Marine Operations Home Page
•  Inquires and Comments
•  URL: http://www.moc.noaa.gov/mf/specs/navigation.htm
•  Updated: April 13, 2009