Yard Slot Risk, Off-Hire Days, Trading Contribution Lost, Slot Premium, Positioning Cost, Overrun Exposure & Economic Yard Selection

Ship Drydock Slot, Off-Hire & Revenue Opportunity Cost Tool

Measure what a drydock really costs once lost trading time is added to the yard invoice. Simple mode converts positioning, waiting, dock and recommissioning days into total economic exposure and shows how many days a slot premium must save to pay for itself. Advanced mode compares multiple yard/slot alternatives using slot-confidence risk, lost-slot delay, overrun probability, deviation fuel, logistics and commercial disruption.

Data type
Currency
Currency selection changes display only. No exchange-rate conversion is performed.
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Comparing yards or slot certainty? Click Advanced above.Build multiple yard/slot alternatives with slot-confidence %, lost-slot delay, overrun probability, yard quote, slot premium, deviation fuel, port/logistics and contract disruption. Advanced compares best-case, expected and stress-case economic exposure.

Fast Drydock Economic Exposure Screen

Enter only days that actually remove or reduce earning/trading availability. Daily net trading contribution should be defined consistently with your commercial model so operating expenses are not accidentally counted twice.

days.
days.
days.
days.
Selected currency / non-earning day.
Selected currency / off-hire day.
Expected-value days already probability-weighted.

Commercial Cost Basis

Selected currency / non-earning day.
Selected currency / off-hire day.
Selected currency / t.
days, owner/project target.
Selected currency total economic exposure.

Yard / Slot Alternative Register

Slot confidence converts lost-slot delay into expected-value days: (1 - confidence) × displacement delay. Overrun exposure is probability × overrun days. Best case excludes both; stress case assumes both happen in full.

Yard / slotPosition daysSlot confidence %Lost-slot delay daysYard stay daysReturn-to-trade daysOverrun probability %Overrun days if it occursYard / repair quoteSlot premiumDeviation fuel tPort / agency / logisticsCommercial disruption one-off

Drydock Execution Readiness

Commercial planning boundary: this tool does not interpret a charter party, determine legal off-hire, establish class docking windows, or replace the yard repair specification and survey plan. Use daily net trading contribution consistently. If your daily figure already includes vessel operating expenses, do not add those same costs again as incremental off-hire support.
Drydock planning context: DNV notes that planning survey scope before the yard can reduce unplanned activities and give more time for repairs inside the scheduled slot, helping avoid costly delays. DNV also maintains fleet-in-service schemes including extended dry-docking / related in-operation arrangements, so the exact class window and required docking scope should be taken from the vessel's current class status rather than assumed from a generic interval. Charter-party off-hire treatment is contract-specific. DNV Main Class Hull Survey Planning · DNV Fleet-in-Service Rules · BIMCO Clauses
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