Enter the small marina and the fuel dock is signposted DCML in green letters. There are 2 berths on a plastic floating pontoon for boats to get a diesel (wear shoes as the plastic is scorching hot). If longer than 42ft with a fuel tank at the stern, better to come in stern-to as fuel hose is short. Tie your lines to plastic rings, there is no assistance. Fenders need to be very low. See photo 2018, courtesy of Maria Wadsworth.
It's also possible to fill jerry cans here using your dinghy.