The IMO check digit
An IMO number is seven digits, where the last is a checksum of the first six weighted 7 down to 2. A single transposed digit fails it. The notice will not generate until the number is arithmetically valid.
Tools · Maritime
Notice of Readiness
Fill in the voyage details and the notice writes itself. The IMO check digit is verified as you type, and a tender time that falls before arrival is refused — the two mistakes that actually cost money on a laytime dispute.
The notice is written in your browser.
Nothing is uploaded. With usage logging on, the form fields you fill in (vessel, port,
cargo, times) are kept to improve the tool; switch it off in the account bar.
What it checks
Two mistakes worth catching.
Tender before arrival
Laytime runs from a validly tendered notice. A tender timestamped before the vessel arrived is not merely wrong, it is challengeable — so the tool refuses to produce one.
The same logic runs as a command line script in the automations collection, if you would rather generate these in a batch.