Tonnage Measurement · Portishead
Tonnage Measurement Portishead
UK Simplified and Full Tonnage Measurement for yachts in Portishead and across Portishead Quays Marina and the Severn Estuary — measurement, calculation and certification for Part I and Part III registration handled by an MCA-authorised surveyor.
What this service involves
Tonnage measurement is a prerequisite for Part I UK registration, for mortgageable title in many lending jurisdictions, and for some commercial flag-change processes. For yachts being purchased or refinanced in Portishead, having the measurement done locally avoids relocating the vessel solely to satisfy a paperwork requirement.
SVG Marine is authorised by the MCA to carry out both Simplified Measurement (the method used for sub-24m yachts entering the Part III Small Ships Register) and Full Tonnage Measurement under the Merchant Shipping (Tonnage) Regulations 1997 (the method required for Part I registration and for larger commercially operated vessels). Both gross and net tonnage are calculated and certified.
Practical workflow: attendance on board for the physical measurements and verification of internal volumes, calculation off-vessel, then issue of the tonnage certificate and the documentation pack the owner or owner's lawyer needs to file the registration application with the UK Ship Register. The Carving and Marking Note is prepared where the registration requires the official number and tonnage to be permanently marked on the main beam.
Combined attendance with MCA coding work, an insurance survey or a pre-purchase survey is straightforward in Portishead — one mobilisation, one set of reports, one fee.
Where we work
Attendances are based at Portishead Quays Marina, with travel-lift and hardstanding work on site. The Severn Estuary tides dictate timing — visits are planned around suitable lock windows. Onward attendance in Bristol Floating Harbour, Sharpness, Cardiff and Penarth fits inside the same trip.
- Portishead Quays Marina
- Portishead Cruising Club
- Bristol Floating Harbour
- Sharpness Marina
- Watchet Harbour Marina
- Severn Estuary moorings
- Bristol
- Sharpness
- Cardiff
Frequently asked questions
Which Tonnage measurement methods do you carry out?
Simplified Measurement (for Part III Small Ships Register) and Full Tonnage Measurement under the Merchant Shipping (Tonnage) Regulations 1997 for Part I registration. Both gross and net tonnage are calculated and certified.
Why measure in Portishead?
If the vessel is being purchased, refinanced or flag-transferred in Portishead, having the measurement done locally avoids relocating the boat to another port simply to issue a piece of paperwork.
Can you handle the registration paperwork as well?
Yes. SVG Marine prepares the tonnage certificate, Carving and Marking Note (CMN) where applicable, and the documentation pack required by the UK Ship Register. The owner or owner's lawyer files the registration application itself.
Which Portishead yards and marinas do you cover?
Portishead Quays Marina, Portishead Cruising Club, Bristol Floating Harbour, Sharpness Marina, Watchet Harbour Marina and Severn Estuary moorings. Most measurements are completed in the berth without a haul-out.
How long does a measurement take?
A simplified measurement is typically a half day on board for sub-24m yachts. Full tonnage measurement on a larger vessel can be a full day on board, with the calculation and certificate issued within seven working days.
Can you combine tonnage measurement with MCA coding or a pre-purchase survey?
Yes — and most owners do. Combined attendance saves mobilisation cost. Tonnage measurement, coding examination and a pre-purchase or insurance survey can all be completed in a single visit.
Is the certificate accepted internationally?
Yes. UK tonnage certification is recognised under the International Convention on Tonnage Measurement of Ships, 1969, and accepted by other flag states, ports of call and Suez and Panama Canal authorities for transit fee calculation.
Do I need tonnage measurement for Part III SSR?
Part III Small Ships Register requires a Simplified Measurement only — straightforward and inexpensive. Part I registration (the full Register, required for marine mortgages) requires Full Tonnage Measurement.
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