Could be a Do 228 from the Coast Guard.
MARINE AIR SQUADRON
The MAS with the present strength of two aircraft Dornier and Defender is entrusted with the responsibility of maritime reconnaissance, Search and Rescue, coastal surveillance, transportation of stores and equipment to outer islands, casualty evacuation and training of pilots and technicians
The Dornier was acquired in 1990 from India. With its greater endurance, it is the only NCG aircraft which can reach Agalega (within 3 hrs ) and has proved to be a big moral booster for the people of Agalega.