U.S. Official No. 1238807
Not yet on Master's MateOn the American registry, OTTO B is a 9.8-metre commercial trawler. She's built with a 4.7 m beam and a 2.6 m draft. Look for U.S. official number 1238807. Bring OTTO B aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.
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 OTTO B on the map. It hands you the full bridge:
© 2026 Master’s Mate. All rights reserved.