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Sealine S 23 insurance: calculate your premium
Model page, insured as a motorboat
For us the Sealine S 23 (twenty-three) is a motorboat. New or used, bought at home or abroad, one previous owner or five: liability, hull, legal expenses and personal accident cover are taken out online in one go, in about five minutes.
At a glance
- Make
- Sealine
- Type of boat
- motorboat
- Length overall
- 7.62 m
- Built
- 1999 to 2008
Length from our boat catalogue for the 1999–2008 build years. Beam and engine are in your papers; what they record is what counts.
Premium, example
€728 a year
or €66 a month if paid monthly
Liability and hull · boat value €33,000 (market value) · built 2004 · 110 hp assumed · inland waters
Finance, example
€302 a month
Purchase price €33,000 (market value) · 20% deposit · 10 years · 6.9% interest assumed
Worked example, not a finance offer. The lender decides on the rate and on approval.
Sealine S 23: cover, cost and conditions
The premium for the Sealine S 23 (twenty-three) is not set by its model name. In the online calculator you give the type of boat, year, value, engine output and cruising area, and those five values make the price.
A year of cover for the Sealine S 23 (twenty-three) starts from €49 a year. For a Sealine S 23 at the usual market value of €33,000 the premium is €728 a year: liability and hull in Basis-Plus, inland waters, 110 hp (assumed), hull excess €250, paid annually. Hull cover accounts for €619, liability for €109. Tariff as of 13.11.2026, your own boat may differ. The rest is set by hull cover and the value of the boat: partial cover for fire, storm, lightning, theft of the whole boat and winter storage, full cover also for collision, grounding, vandalism and theft of parts. If the boat is lost completely, we pay the agreed value, in Premium with no new-for-old deductions.
We also write the Sealine S 23 (twenty-three) when it was bought used, imported or ordered straight from the yard, with a berth at home or abroad. The international certificate of insurance, which you receive automatically, covers ten languages. A policy that starts before the handover covers transport and the first launch.
Not to be mixed up with its sisters: this is the Sealine S 23, number twenty-three.
What is a used Sealine S 23 worth?
A used Sealine S 23 built between 2002 and 2005 in average condition is typically worth between
€28,200 and €39,000 today.
Well kept boats with recent engines sit above that, boats with defects below.
| Year built | typical range | midpoint |
|---|---|---|
| 2005 | €30,600 to €39,000 | €34,800 |
| 2004 | €29,000 to €37,000 | €33,000 |
| 2003 | €28,400 to €36,200 | €32,300 |
| 2002 | €28,200 to €35,800 | €32,000 |
With agreed-value cover, the agreed sum counts after a total loss of your Sealine S 23;
with actual-value cover, the value at the time.
Does your sum still fit?
Each extra year of age takes about 3% off the value of a Sealine S 23.
Market today
For sale in November 2026
4
Typical asking price, 2004 boat
€37,300
Our value, 2004 boat
€33,000
Asking prices against our value
+13%
In November 2026 we found 4 boats of the Sealine S 23 for sale.
Typical asking price for a 2004 Sealine S 23: €37,300.
Our value for a Sealine S 23 of that year: €33,000.
Asking prices for the Sealine S 23 are about 13% above our value.
What changes hands is usually less than the asking price.
Boats for sale now and how we rate them
How we rate the 4 boats of the Sealine S 23 we found for sale most recently.
2003
7.62 m, Norway
2003
Germany
2003
7.62 m, United Kingdom
2002
United Kingdom
Take care with prices far below the market: fraud does occur.
Never pay in advance, see the boat in person and check papers and ownership.
As of November 2026.
Prices and details come from the listings.
Whether the boat is still for sale is shown in the listing.
Our assessment assumes average condition.
Estimate from our boat records, checked regularly against asking prices. As of November 2026. Not a survey.
Frequently asked
Does NAMMERT insure the Sealine S 23?
Yes.
We accept a Sealine S 23 (twenty-three) like any other boat: type of boat, year, value,
engine output and cruising area decide, not the builder.
What does cover for a Sealine S 23 cost?
Cover for the Sealine S 23 (twenty-three) starts from €49 a year.
For a Sealine S 23 at the usual market value of €33,000 the premium is €728 a year:
liability and hull in Basis-Plus, inland waters, 110 hp (assumed), hull excess €250, paid annually.
Hull cover accounts for €619, liability for €109.
Tariff as of 13.11.2026, your own boat may differ and then depends on your entries.
The online calculator shows the exact amount in a few minutes, without contact details.
My model is spelled slightly differently, does this page still apply?
Yes.
What exactly the Sealine S 23 (twenty-three) is called often depends on the year and the papers.
Take the name from your documents, the calculation uses the technical figures.
On a total loss, do I get the replacement value?
With full cover, yes.
The Sealine S 23 (twenty-three) is settled at the agreed value,
in Premium with no upper limit and no deduction for new-for-old.
Can I switch from my existing insurer?
Yes.
We cancel your existing contract for the Sealine S 23 (twenty-three) through the switching service
at no cost.
You pay only once it has run out and secure a permanent switching discount.
Other models by this make
Sealine S 23 insured in five minutes.
Calculate your insurance premium online, policy the same day, or call us: +49 3375 / 29 12 77.
