MMSI 303017000 · Call sign WDI9689
Not yet on Master's MateDoubleskin 506, a commercial trawler under the American flag, measures 51.1 metres on deck. She carries a 12.2-metre beam and a 4.3-metre draft. Officially she's MMSI 303017000, call sign WDI9689, IMO 8107816. Out where help is far away, Doubleskin 506 has the free Master's Mate Safety Initiative Network — and a fleet that answers.
Live AIS traffic, weather you can plan around, engine & systems telemetry, and a distress mesh that reaches nearby boats.
Keep the fleet in sight — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Joining the Safety Initiative Network doesn't just put Doubleskin 506 on the map. It hands you the full bridge:
© 2026 Master’s Mate. All rights reserved.