Which figure is typically used for port dues and canal tolls, and why?

A. Net Tonnage, because it represents the ship's revenue-earning space after deducting non-revenue areas like machinery and crew accommodation

B. Deadweight, because tolls are based on cargo-carrying capacity alone

C. Lightship, because it reflects the ship's fixed structural cost

D. LOA, because berth length determines the charge

A. It only accepts reports from cargo ship crew, not yachts

B. CHIRP Maritime is a confidential, voluntary reporting programme for near-misses and safety concerns across the maritime industry (including yachting), allowing issues to be raised and shared as anonymised "Maritime Feedback" without identifying the reporter or vessel, helping the wider industry learn from incidents that might otherwise go unreported

C. It is a crewing agency for yacht jobs

D. It is a mandatory daily logbook for engine room readings

A. Weather forecasts are only relevant for ocean crossings, not coastal passages

B. A single mobile phone weather app is sufficient for all passages

C. Only the forecast for the departure port matters; conditions en route and at the destination are not needed

D. Multiple sources — e.g. official forecasts (Met Office/NOAA shipping forecasts, NAVTEX weather messages), GRIB files for route-specific wind/wave data, and synoptic charts — should be cross-checked, since no single source is infallible and trends/discrepancies between sources can highlight uncertainty in the forecast