Offline-First Maintenance Software: How Ship-to-Shore Sync Works at Sea

Connectivity at sea is improving, but it is still expensive, slow and unreliable. Maintenance software that depends on a constant connection will fail exactly when the crew needs it. The answer is an offline-first design.

What offline-first means

Everything the crew does on board is saved on the ship's own computer. Jobs can be completed, spares issued and defects logged with no internet at all. When a connection becomes available, the ship sends its changes to the shore and receives the office's changes in return.

How the ship and office stay consistent

• Merge by time: when the same record is changed in two places, the most recent change is kept.
• Deletions are remembered: a deleted item stays deleted instead of reappearing after the next sync.
• Small transfers: only the data needed is exchanged, which suits a limited satellite link.
• Instructions from shore: the office can send jobs and changes to the ship, and the ship confirms receipt.

Making sure data goes to the right ship

In a fleet, the worst mistake is one vessel's data landing in another's record. NavTech's Shore Server identifies each ship by a vessel key, a validated IMO number and a unique installation ID. All three must agree before data is accepted.

What the fleet office gains

Superintendents see overdue and critical jobs, stock levels, defects and certificates for every ship on one screen, and each superintendent can be limited to assigned vessels. Requisitions can be approved ashore and reach the ship at the next sync.

Security basics

The Shore Server stores account passwords in hashed form, locks an account for 15 minutes after repeated failed logins, and keeps each vessel's data separate. Backups of the ship's data can be encrypted with a password.

To see how it fits your fleet, read the installation and ordering guide or ask for a demonstration.

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