Ship's papers, registration, insurance and radio
1The lesson in plain words
Carry the required papers for your boat, insurance and radio in an accepted form, plus your licence and ID where required.
Registration gives a nationality
A boat has the nationality of the state whose flag it is entitled to fly. Under the UNCLOS (the UN Convention on the Law of the Sea), every ship sails under one flag only. The registration certificate records the boat's flag and identity; it does not always prove ownership. Registration requirements and small-boat exemptions vary by country.
The flag
A registered boat flies its national ensign (its nationality flag), usually at the stern. The flag state's rules then follow the boat: its licences, its equipment list and its inspections. Changing the flag means changing the registration first.
Insurance
Third-party insurance pays for injury or damage you cause to others. Many countries make it compulsory, for example Spain, Portugal, Italy, Croatia and Greece; others do not, but almost every marina and charter company asks for it. Carry the certificate on board, in the local language or English if you can.
Radio papers
For VHF (very high frequency) marine radio, check your flag state's authorisation rules: you may need a ship station licence. Exemptions vary. A call sign identifies the station; an MMSI (Maritime Mobile Service Identity) is its nine-digit identity for DSC (Digital Selective Calling, for digital radio calls) and AIS (Automatic Identification System, for identifying vessels). Voice-only VHF does not always need an MMSI. You normally need an accepted operator qualification, such as the SRC (Short Range Certificate); national alternatives apply. Missing paperwork must never delay a distress call.
Builder's papers
Most recreational craft 2.5–24 m long first placed on the EU market or put into service from 16 June 1998 need CE marking (the mark showing compliance with EU product rules) under the Recreational Craft Directive (RCD), subject to exemptions. A later resale alone does not bring an older boat under that rule. The builder's plate shows the design category, maximum load and number of people. Keep the owner's manual on board.
Design categories
Wind strength uses the Beaufort scale; significant wave height averages the highest third of waves. A covers winds above force 8 and waves above 4 m, excluding abnormal conditions. B covers up to force 8 and 4 m; C up to force 6 and 2 m; D up to force 4 and 0.3 m, with occasional waves up to 0.5 m. Individual waves can be higher. Categories are not distance permissions.
2Key data
- Nationality
- One flag per boat, proved by the registration certificate
- MMSI
- 9-digit identity for DSC and AIS; not always needed for voice VHF
- RCD: Beaufort / significant waves
- A >8/>4 m · B ≤8/≤4 m · C ≤6/≤2 m · D ≤4/≤0.3 m
- Usual papers on board
- As required: registration, insurance, radio papers, licence + ID
3Key points
- 1
Registration records flag and identity; it does not always prove ownership. A boat has one national flag.
- 2
The flag state's licences, equipment rules and inspections follow the boat.
- 3
Third-party insurance is compulsory in many countries and asked for by most marinas.
- 4
Check flag-state radio authorisation and accepted operator qualifications; national exemptions and alternatives apply.
- 5
The CE builder's plate shows the design category, maximum load and maximum people.
4Frequent mistakes
Wrong: A copy of the papers left at home is enough.
Right: Carry each required document in a form the relevant authority accepts: originals, authorised copies or official digital records.
Wrong: Anyone may use the VHF if the boat has a radio licence.
Right: Check the accepted operator qualification and national exceptions. Missing paperwork must never delay a distress call.
Wrong: Design category C means the boat may go to zone C.
Right: The design category describes the wind and waves the boat was built for. Navigation zones are a separate, national idea.
5Practice case & exam keys
A marina official abroad asks for your boat's papers. You have your licence, a photo of the registration on your phone, and the insurance policy in your home language. The VHF is fitted but you never applied for anything for it. What may be a problem?
Show the answer
A phone photo may not qualify. Carry each required document in a form the relevant authority accepts: originals, authorised copies or official digital records. An insurance certificate in English or the local language can avoid delays. Check flag-state radio authorisation, whether an MMSI is needed, and accepted operator qualifications or national alternatives. Missing paperwork must never delay a distress call.
Exam keys
- A boat has the nationality of the state whose flag it may fly: one flag only.
- Carry the required registration, insurance, radio papers, skipper qualification and ID in accepted forms.
- Radio: check flag-state authorisation and operator rules; paperwork must never delay distress calls.
- RCD categories A–D describe wind force and significant wave height, not distance offshore.
Finish this unit
When you've read it, answer three questions. Get all three right to finish the unit; opening the page alone doesn't count.
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