Your boat's AI crew member.

NMEA 2000 monitoring with AI-powered alerts for cruising sailors. A small fanless computer connects to your boat's network and watches depth, position, wind, and system health around the clock.

Monitoring & Alerts

• Anchor watch with drag detection
• Shallow water warnings before you get there
• Battery voltage drops, bilge pump cycles, engine alarms
• AIS targets entering your watch radius

Ask your boat anything

• "What's my average fuel consumption this passage?"
• "How deep was it where we anchored last Tuesday?"
• "Wind's shifted 40° in the last hour—is the anchor still holding?"
• "Compare today's engine temp to the last month"

Your manuals, actually useful

• "How do I bleed the Volvo D2 fuel system?"
• "What's the torque spec for the saildrive seal?"
• "When was the last time I changed the impeller?"
• "What oil does the Lewmar windlass take?"

Passage planning

• "We're making 6.2 knots—what's our ETA to Falmouth?"
• "At current consumption, do we have enough fuel to reach Brest?"
• "Log our position every hour until we arrive"

Maintenance tracking

• "Log an oil change, 127 engine hours"
• "When's the antifouling due?"
• "Remind me to check the cutlass bearing in 50 hours"
• "What maintenance have I done this season?"

Weather & decisions

• "Wind's forecast 25 knots—should I put in a reef before it hits?"
• "We're seeing 15 knots apparent—what's the true wind?"
• "Summarise the conditions for the last 6 hours"

Night watch companion

• Morning briefing at 0700: weather, systems check, battery state
• Proactive alerts if something looks wrong
• "Wake me if wind exceeds 20 knots or depth drops below 5m"

[NMEA 2000 backbone] → [USB-CAN adapter] → [bosun.bot device] → [WhatsApp/Telegram alerts and chat]

Online — AI assistant, alerts to your phone, remote access, weather data Offline — Data logging, threshold alerts (local buzzer/display), manual lookup continues from cached docs

• 🌐 bosun.bot
• 📖 Documentation

Built for sailors by a sailor