Insuring Williams Jet Tenders: cover and premium
inflatables and RIBs · the United Kingdom
Williams Jet Tenders builds inflatables and RIBs in the United Kingdom. NAMMERT insures a Williams regardless of year built or where you bought it, liability, hull, legal expenses and personal accident cover from one house, taken out online in five minutes.
At a glance
Origin
the United Kingdom
Class
inflatables and RIBs
Typical sizes
2,5 to 6 m
Premium from
from €49 a year for liability
Worth knowing
Williams Jet Tenders; cover, cost and conditions
Williams Jet Tenders builds jet-driven tenders in England, tenders tailored to the stern garage of a yacht that manoeuvre safely among swimmers because there is no propeller. The jet drive is the structural difference and at the same time the point that shapes the hull insurance: no propeller means no propeller damage, but an impeller that is exposed to intake damage.
Intake damage in shallow water counts as operational damage and is not covered; a jet drive that draws in sand or gravel wears more quickly, and that is a question of handling. Consequential damage to the drive after grounding or collision is covered. When landing on a beach, pay attention to the intake area; on jet tenders this is the most sensitive spot and the most frequent avoidable damage.
As the tender of a yacht, a Williams is covered at no extra premium up to a value limit if it is stated in the application. With the larger models with a diesel jet this limit is exceeded, and then the tender belongs in the contract as a separate item. Damage while launching with the davit and while stowing it in the garage is covered, because craning and launching are expressly included.
Questions and answers
Frequent questions
Is intake damage to the jet drive covered?
No, not for Williams either: sand and gravel in the intake area are operational damage.
Consequential damage to the drive after grounding or collision is covered under full hull cover.
Is the tender included in the yacht policy?
For Williams: Up to a value limit at no extra premium, if it is stated in the application.
Larger models with a diesel jet belong in the contract as a separate item.
The cover that fits
tender insurance
Tariffs, cover and FAQ for tender insurance in detail.
Third-party liability
The foundation for a boat from Williams: damage to third parties, worldwide,
from €49 a year for liability.
Hull cover
Partial or full hull cover for a Williams, at replacement value with an agreed fixed value.
For the whole class of boat
For Williams: What matters for inflatables and RIBs is the same across every brand; engine output,
how a claim is settled, cruising range and theft protection.
The class page lists every point and every brand in this class, Williams included.
Insuring inflatables and RIBs, every brand and every condition
Other builders in this class
Nautical information What counts before you cast off, papers, equipment, waters
Licence
A powerboat licence (inland or coastal) is required from 15 hp (11.03 kW).
Registration
Registration from 3 hp; for trips abroad carry the boat certificate or flag document.
Waters
Inland, coastal and abroad; plan fairways, bridge clearances, draught and tides.
Equipment
Lifesaving gear, fire extinguisher, anchor, signalling equipment and correct navigation lights.
Cruising range
The agreed cruising range is stated in the policy and can be extended at any time.
Weather
Check wind force in Beaufort and wind direction before casting off, and allow for gusts.
General guidance, not a complete account;
what governs are the rules of the waters you are on and the manual of your Williams.
Current wind force and direction for your waters are shown on the Home.
Series by Williams, with value and cover
Dieseljet 445 / 505 is an inflatable with engine from Williams, built since 2012,
and today changes hands at between €90,000 and €190,000.
Minijet 280 is an inflatable with engine from Williams, built since 2015,
and today changes hands at between €30,000 and €55,000.
Turbojet 285 / 325 is an inflatable with engine from Williams, built since 2005,
and today changes hands at between €35,000 and €90,000.
Sportjet 435 / 520 is an inflatable with engine from Williams, built since 2012,
and today changes hands at between €70,000 and €180,000.
As the Dieseljet 445 / 505, Minijet 280,
Turbojet 285 / 325 by Williams and 1 more series are still in production,
parts are available and repair costs are predictable.
Even so, value it at replacement cost including retrofitted electronics, not at list price.
For the Dieseljet 445 / 505, Minijet 280, Turbojet 285 / 325 by Williams and further series:
On an inflatable the cause decides, not the damage: a tear from impact is covered,
porous fabric after years in the sun is not.
The outboard belongs in the policy with its serial number.
The Williams range in figures
These figures come from the model records we keep for Williams: boat type, build years and length,
nothing estimated.
- inflatable with engine
- 19 models, since 2003, mostly 2.9 to 6.3 m
Which model was built when?
What does a used Williams cost?
We hold today’s price ranges by year for 18 models by Williams.
The table shows what boats in average condition are worth,
from the oldest to the youngest year on record.
Choose your exact model, year and condition in the calculator.
| Model | Years built | Range today |
|---|---|---|
| Williams Dieseljet 445 | 2011 to 2024 | €24,200 to €63,600 |
| Williams Dieseljet 505 | 2011 to 2024 | €25,700 to €66,200 |
| Williams Dieseljet 565 | 2011 to 2024 | €32,900 to €81,500 |
| Williams Dieseljet 625 | 2014 to 2024 | €30,400 to €93,200 |
| Williams Evojet | 2020 to 2024 | €50,100 to €99,800 |
| Williams Jet 285 | 2007 to 2014 | €8,400 to €13,600 |
| Williams Minijet 280 | 2016 to 2024 | €11,900 to €29,000 |
| Williams Sportjet 345 | 2017 to 2024 | €16,500 to €48,100 |
| Williams Sportjet 395 | 2017 to 2024 | €15,700 to €48,200 |
| Williams Sportjet 400 | 2016 to 2018 | €20,000 to €29,100 |
| Williams Sportjet 435 | 2019 to 2024 | €21,900 to €42,900 |
| Williams Sportjet 460 | 2014 to 2024 | €21,600 to €48,900 |
| Williams Sportjet 520 | 2014 to 2024 | €29,200 to €62,500 |
| Williams Turbojet 285 | 2006 to 2024 | €9,300 to €30,200 |
| Williams Turbojet 325 | 2007 to 2024 | €8,100 to €28,200 |
| Williams Turbojet 385 | 2007 to 2021 | €11,100 to €33,300 |
| Williams Turbojet 445 | 2008 to 2018 | €12,100 to €29,800 |
| Williams Turbojet 505D | 2011 to 2014 | €25,400 to €37,600 |
Estimate from our boat records, October 2026.
Not a survey.
Models by Williams we insure
Each Williams model has its own page with cover, cost and the points that matter for that boat.
Your model not listed?
We insure it all the same.
Williams insured in five minutes.
Boat type, year built, length and value of your Williams are all we need.
Work out the premium online or call us: +49 3375 29 12 77.
