The London P&I Club has warned owners of costly grounding claims arising from too-lengthy gaps between position-fixings.

It said the intervals had been a contributory factor in some recent costly cases.

The club cited the example of a laden bulk carrier that grounded on a shoal in circumstances where a previous inaccurate dead-reckoning plot was not detected in time.

Although there were several contributory factors to the grounding, it said that if a more appropriate position-fixing interval had been employed, it is likely that the discrepancy between the erroneous dead-reckoning plot and the ship’s subsequently plotted position would have been observed in time to correct the situation.