Dock slot calculator

1 · Your figures

Fixed cost per day is what the facility costs whether or not a ship is in it: crew on payroll, dock and lift upkeep, insurance, depreciation, admin. If you know it per month, use the helper.

This page runs entirely in your browser. What you type is saved on this device only — so a refresh does not lose your figures — and never reaches any server: no upload, no email, no analytics. Save the file and it works with no connection at all.

2 · Work groups

Shares default to the structure of 71 real docking invoices — a starting point, not your numbers; overwrite them. Variable cost is the part of the group's list price that you actually pay out when the work happens: materials, consumables, subcontractors, hired labour. If your own crew is paid whether or not this ship comes in, leave their wages out — that is the whole point of the calculation.

3 · Result

4 · What different discounts do

The discount below is applied to every group except the ones marked “no discount”. Contribution is what the job leaves after the money you pay out; the last column subtracts the fixed cost of the days it occupies.

5 · Where the candidates come from

The calculator prices a job. It does not find one. This is the part that does — a search anyone in the commercial office can run in about twenty minutes, on a free public portal, with no account and no subscription.

1. Open the Mediterranean MoU inspection database: portal.emsa.europa.eu/web/thetis-med/inspections. No login. Türkiye is a port state there, so inspections in Turkish ports are in it. For North-European ports the Paris MoU database (THETIS) works the same way.
2. Set the period to the last twelve months. The form takes at most three years per query.
3. Set the port state to Türkiye — or to the ports whose traffic passes your dock.
4. Set the deficiency area to Structural conditions. Run it, then run it again for Water/weathertight conditions. Those two families point at hull work; most of the other thirty-odd point at paperwork, drills and equipment.
5. Narrow by ship type, gross tonnage and age until what is left is what your dock actually takes.
6. Open a record and read its Details pane: every statutory certificate with its expiry date, and the date and place of the last survey. From those two you can place the next docking window yourself — class runs a five-year cycle, with bottom surveys no more than 36 months apart.
7. What you have then, per hull: the fault an inspector wrote down, the owner and the manager, and the window in which the ship has to be in somebody's dock. Take that job to the calculator above and decide what you can afford to quote.

For a sense of the volume — Turkish ports, the twelve months to 25 August 2026, structural plus water/weathertight deficiencies: 921 inspections, 819 distinct ships, 226 of them detained. We ran that query once, to see whether the method was worth writing down. We did not keep the list.