Aden historically has provided ship bunkering services, which was for much of its history its main source of business. With the construction of the Ma'alla Terminal, Aden Container Terminal and the Aden Gulf Terminal its main business is cargo handling, but Aden continues to provide ship bunkering at two dolphins on the south side of the harbour, 6 In and Out. These are operated by the Corporation and Aden Bunkering Department, a branch of the Aden Refinery Company. Another bunkering berth is available at Berth 8 Out, east of Flint Island, which is in occasional use.
Berths 6 In and 6 Out are collected by pipeline to shore storage tanks for various grades of ship's fuel oil.
On the north side of the harbour, Berth 7 is operated by the Arabian Investment, Manufacturing and Trading Company (AIMT). This berth is connected by a bundle of pipelines to oil storage tanks ENE of Berth 7. These are used for oil storage and blending to meet customer's demand. Bulk oil is imported to and exported from the dolphin using tankers of up to 40,000 TDW.
Ships and other craft, such as large barges, crane barges etc., can moor at buoy berths in the harbour. Two berths, 5 In and 5 Out, with a minimum depth of 11.4 meters below chart datum, are on the north side of the harbour. On the south side of the harbour, inside the breakwater, are Berths lA, 1B, lOut and 1 In. Berth lA is obstructed by a wreck. Buoys T4, T5 and T6 are used by Corporation tugs. North and east of the Yemeni Navy Pier are Berths 4 In and 4 Out. East of Flint Island are Berths 8 In and 8 Out. Depths are these berths are generally between 5 and 9 meters below chart datum. Ships calling for bunkers and oil import/export at the dolphin and buoy berths are handled by Corporation pilots, tugs and mooring boats.