In the event of dry docking or other necessary measures to maintain the efficiency of the vessel, deficiency of men or owner’s stores, breakdown of machinery, damage to hull or accident, either hindering or preventing the working of the vessel and continuing for more than 24 consecutive hours, no hire to be paid in respect of any time lost thereby during the period in which the vessel is unable to perform the service immediately required. Any hire paid in advance to be adjusted accordingly. In the event of the vessel being driven into port or anchorage through stress of weather, trading to shallow harbours or to rivers or to ports with bars or suffering an accident to her cargo, any detention of the vessel and/or expenses resulting from such detention to be for the charterers’ account even if such detention and/or expenses, or the cause by return of which either is incurred, be due to, or be contributed to by, negligence of the owners’ servant. That in the event of the loss of time from deficiency of men or stores, fire, breakdown or damages to hull, machinery or equipment, grounding, detention by average accident to ship or cargo, dry docking for the purpose of examination or painting bottom, or by any other cause preventing the full working of the vessel, the payment of hire shall cease the time thereby lost; and if upon the voyage speed be reduced by defect in/or breakdown of any part of her hull, machinery, or equipment, the time so lost, and the cost of any extra fuel consumed in consequence thereof, and all extra expenses shall be deducted from the hire. The basic rule of interpretation is that the cause of the delay must “relate to the efficiency of the ship and prevent the full working of her”. This could take a variety of forms, the most obvious of which are physical damage to the vessel. Clear examples are such things as an engine or boiler breakdown, grounding or fire.