Question 1986Navigation General

The correct answer is A) low water spring. When a vessel grounds in soft mud, the best chance of refloating it is on the next tide at low water spring. This is because low water spring tides have the greatest range, meaning the lowest low tides, which provides the most clearance under the vessel to float it off the mud when the tide comes back in. The other options are not as favorable - high water spring and high water neap tides have less tidal range, while low water neap tides have the smallest range, providing the least amount of clearance for refloating.