Vessel registry — IMO, MMSI, class, flag, deck plans

Every ship in your fleet has a vessel record at Fleet → Vessels. The record is the parent that defects, maintenance, certificates, drydock, PSC, and bunkers all attach to.

What a vessel record holds:
• Name, type (passenger / ro-pax / cruise / cargo / tanker / tug / fishing / yacht), and call sign
• IMO number — the permanent global identifier (7 digits, never changes when the ship is sold or renamed)
• MMSI — radio identity used by AIS (9 digits)
• Class society (ABS, DNV, Lloyd's, RINA, BV, ClassNK, KR, RS) and class notations
• Flag state, port of registry, and gross tonnage
• Build year, builder, length over all (LOA), beam, draft
• Deck plan upload — used by the Defects tab so crew can drop a pin on a specific bulkhead, frame, or compartment

Adding a vessel:
1. Fleet → Vessels → + Add vessel
2. Enter at minimum the name and IMO number
3. Save — the ship appears in the registry; you can add details, deck plans, and certificates anytime

Why IMO is non-negotiable:
PSC, class survey, and EU-MRV reporting all key off the IMO number. If you skip it, downstream automation (auto-flagging duplicate ships, IMO-DCS export, port-call lookups) won't fire.