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4-1
4. Tracked Target (TT)
Operation
4.1 Usage Precautions
• This TT function meets the IMO requirements for the TT.
• For sake of brevity, this manual uses "TT" when referring to Tracked Target.
• Tracking accuracy is affected by the following:
• Tracking accuracy is affected by course change. One to two minutes is needed to restore vectors to full
accuracy after an abrupt course change. (The actual amount depends on gyrocompass specifications.)
• The amount of tracking delay is inversely proportional to the relative speed of the target. Delay is on the
order of 15-30 seconds for high relative speed; 30-60 seconds for low relative speed.
• The data generated by this TT are intended for reference only.
A target measuring 800 m or more in the radial or circumferential direction is regarded as a landmass and not
acquired or tracked. Echoes smaller than 800 m are regarded as targets to be tracked.