The Master (Code Vessels <200gt) Officer of the watch (Yachts <500gt) training covers two capacities:
Limited (not more than 150 nautical miles from a safe haven) and Unlimited (unlimited area).
Passing the Master 200gt will allow you to become the Captain on any vessel less than 200gt. This includes work boats and wind farm support vessels.
Work towards your Master (Yachts <500gt/3000gt) Certificate of Competency
To command vessels up to 500gt/3000gt commercially, you’ll need a Master (Yachts less than 500gt/3000gt) Certificate of Competency.