The FAR-21x7/28x7 series radar delivers full ARPA functionality and can plot up to 100 targets. In addition, this radar series is displaying up to 1,000 targets received from the AIS transponder system. Detailed information about the targets can be shown in data cells on right hand side of the screen. ARPA/AIS information scheme gives the operator full control over dense traffic. The type of AIS Symbol shows if it is a sleeping target, a normal target, a selected target, a dangerous target or a lost target.

AIS Symbols

COG/SOG vector changes its length with speed. ROT mark is viewable at the COG/SOG vector tip when a target has FURUNO Satellite Compass SC-50/110 or gyrocompass, which deal ROT serial sentence, installed.

ARPA Symbols

Target Association (Fusion)

Targets may be recognized both by AIS and ARPA and displayed with two respective symbols on the screen. This happens because the AIS position is measured by a GPS navigator in L/L, which the RAPA target are measured by range and bearing from own ship. Here, the APRA symbols are merged into the AIS symbols, provided that both symbols are within operator-set criteria, which are determined by the differences in range, bearing, course, speed and others.

ARPA/AIS Data Display

Information about ARPA targets displayed in data cells includes:
  • Bearing
  • Range
  • Course
  • Speed
  • Closest Point of Approach
  • Time to Closest Point of Approach
  • Bow Crossing Range and Bow Crossing Time.
Information about AIS targets displayed in data cells includes:
  • AIS target name
  • Bearing
  • Range
  • Course
  • Speed
  • Closest Point of Approach
  • Time to Closest Point of Approach
  • Bow Crossing Range
  • Bow Crossing Time
  • Heading
  • rate of Turn
  • Call sign and MMSI number