Understanding Marine Surveys in Turkey
A closer look at what determines price, how the inspection actually works, and why skipping it is rarely worth the saving.
What Sets the Price
Four variables drive the fee, in order of impact: boat length (every extra foot adds inspection time and scope), boat type (a catamaran's two hulls add 30-50% over a monohull of the same length), age (vessels over 15 years need a more detailed osmosis and structural check), and location (İzmir is the base area; regions outside the İzmir area and Ayvalık carry a travel surcharge). Sea trial and the digital report are always included; haul-out fees are not.
| Factor | Impact | Why |
| Boat length | Very high | Every extra foot adds inspection time and scope |
| Boat type | High | Catamarans add 30-50% for the second hull |
| Boat age | Medium | 15+ years needs deeper osmosis and structural checks |
| Location | Medium | Bodrum is base; Istanbul and Greece add travel cost |
| Survey package | Medium | Pre-purchase > insurance ≈ valuation |
| Add-ons | Low | Diver check, engine diagnostic, priority service |
The Technical Methods We Use
Moisture-meter survey is the primary method for detecting osmosis in GRP hulls: a calibrated moisture meter systematically scans the entire underwater surface, and readings are mapped against baselines for the hull material and age. The hull needs at least at least a week dry before scanning for a reliable reading. Thermal imaging scans the electrical panel, wiring runs, connections and engine to catch fire risk early, before a fault becomes visible. Sea trial tests the engine, gearbox, steering and hull behaviour under real load, vibration, overheating and structural noise that never show up with the engine idling at the dock only appear once the boat is moving.
Osmosis: The GRP Owner's Biggest Risk
Osmosis is water penetrating between the laminate layers of a fibreglass hull, triggering chemical breakdown. Early-stage osmosis shows as small surface blisters and is comparatively cheap to fix. Advanced osmosis has worked deep into the laminate, threatens structural integrity, and can require €8,000-€25,000 or more in gel-coat peel, drying, epoxy barrier and laminate repair, depending on length and depth. We combine moisture readings with systematic percussive testing and visual inspection to catch it at the earliest possible stage.
A properly executed survey report typically pays for itself many times over, both at the negotiating table and later, at renewal, by giving the insurer an accurate picture of the vessel's real condition.
What Buying Without a Survey Can Cost You
- Advanced osmosis: €8,000-€25,000 or more in repair
- Hidden structural damage: filled cracks or resin-injected fractures under cosmetic gelcoat
- Engine overhaul: high-hour or worn engines, €10,000-€30,000
- Electrical fire risk: old or improvised wiring
- Rigging failures: hidden wire fatigue and terminal corrosion
Where We Survey
- Bodrum & Milas: Milta Marina, Bodrum Marina, Torba Marina, Yalıkavak Marina
- Göcek & Fethiye: Club Marina, Setur, D-Marin and İskele marinas
- Marmaris: Netsel Marina, Marmaris Yacht Marina
- Istanbul & North Aegean: Ataköy, Kalamış, Ayvalık, Çeşme marinas
- Antalya & Mediterranean: Antalya Marina, Kemer, Finike, Kaş
- Mersin & Eastern Mediterranean: Mersin Marina, Kumkuyu, Taşucu
Who Should Book a Survey
- Second-hand boat buyers: the single most important use case, a survey grounds the purchase decision in fact rather than the listing photos
- Anyone insuring a boat: most insurers require a condition report for vessels over a certain age
- Overseas buyers: essential when purchasing remotely without visiting Turkey in person first
- Sellers: a pre-sale condition report justifies your asking price and builds buyer trust
- Banks & finance companies: independent valuation is required for mortgage or leasing arrangements
What to Check Before Buying a Used Boat
The most common regret we see as surveyors is a buyer who skipped the survey and relied on a visual look alone. At minimum, check these yourself, though most can only be assessed reliably once the boat is hauled out and with the right equipment:
- Below the waterline: blistering, softness, or irregularities under the paint can signal osmosis
- Engine room smell: burning, fuel, or mildew odours are an early warning sign
- Damp or staining: water marks on cabin ceilings or walls point to a hidden leak
- Electrical panel: improvised wiring or scorched sockets are a fire risk
- Service records: engine maintenance history and hour meter should match the listing
- Registration and HIN match: the hull identification number must exactly match the registration papers
If you're unsure about any of these, or even if you aren't, given the sums involved, an independent survey surfaces problems that aren't visible to the eye and strengthens your negotiating position.
Survey Terms, Explained
| Term | Meaning |
| Survey | Comprehensive technical inspection of a boat |
| Surveyor | Independent, credentialed vessel inspector |
| Osmosis | Chemical breakdown from water penetrating a GRP hull |
| GRP | Glass Reinforced Plastic, fibreglass hull material |
| HIN | Hull Identification Number |
| Sea trial | Under-way test of engine and systems in real conditions |
| Blister | Surface bubble caused by osmosis |
| LOA | Length Overall, the boat's total length |
| ABYC | American Boat & Yacht Council, international small-craft standards body |