USCG-RADAR-L3.2

Worked plot 1: collision course and avoiding action

USCG-RADAR-M3 · Relative Motion Plotting · USCG-RADAR-M3-A The e-r-m method and two worked plots, from CPA and TCPA to avoiding action and ARPA checks.

A target on a **steady bearing, closing range** in fog. We find her true course and speed, then test two avoiding actions against **Rule 19**.

AI-drafted catalogue content pending SME review. Radar Observer renewal by sea service depends on the NMC accepting that the position routinely used radar, and the carriage rule turns on inspected status and GRT; verify with the National Maritime Center and your approved course provider before relying on either.