Free to start · Lives in WhatsApp

Wake up to a crewmate who already checked the weather, the anchorage, and your boat.

Bosun is digital crew for your boat. Morning weather where you actually are. Which hook to pick. Every system on board — and when the oil is due. Nothing to download. Just a text.

How it works
Free to start. Open this on your phone, send one simple message, and meet your bosun.

What captains actually get

Not another weather app. A crewmate that remembers this boat, texts like it’s on board, and gets more useful every week.

Weather updates where you are

True wind in knots. Waves as height and period. For the spot your boat is sitting in — not a whole ocean blob on a chart.

Anchorage intel that fits this wind

Which hook to pick. Why it holds. What cruisers said last season. Nearby motus are not the same place — Bosun won’t mash them together.

Every system on your boat

Engines, watermaker, batteries, sails. Dump the manuals and serial plates once. Bosun files them on your boat and keeps a maintenance schedule so nothing sneaks up on you.

Hop plans for this hull

When to leave. Pass timing in plain words. Reefing for your boat — not a lookalike from another yard.

Supply ships, named

Which freighter is inbound. A window if the arrival is fuzzy. Then a ping when she’s on the wall. No invented weekday.

What’s worth going ashore for

A real restaurant with a real dish when we have one. Dive shops. Markets. Festivals with a date — not a rumor from the next island.

Built for the moment you’re actually deciding

Three things captains ask most. Bosun answers like crew — short, clear, useful.

Weather

“Is today a stay-put day?” Morning brief at your hook. Wind, seas, and what that means for you.

Anchorages

“Where should we drop tonight?” Protection versus this wind and swell. Dated notes. A why you can trust.

The boat

“When is that filter due?” Systems, serials, manuals, and a maintenance schedule that lives with the boat — not in a forgotten folder.

Get started free in three taps

No app store. No account form. One WhatsApp text and you’re talking to crew.

Tap the green button

Opens WhatsApp on your phone with a ready-to-send hello.

Name your boat

A pin works. A tracking link or AIS number is even better.

Ask anything

Weather. The next hop. Dump a PDF. Snap an engine plate. Free to start.

Your next crewmate is one text away.

Free to start. Exciting nights underway feel better when someone already checked the window, the pass, and the batteries.

Free to start. Open bosunbot.com on the phone you take in the dinghy.