There are a few companies based on Gili Trawangan that offer boat trips to the surrounding islands of Lombok, Sumbawa and to Komodo.
Blue Water Cruises are based just north of the harbour and run trips around the 3 Gilis, to Lombok and Komodo.
South Sea Nomads South Sea Nomads have 2 bases on Gili T, one at Gili Hostel and another at Manta Dive. They offer private half day, full day and sunset charters for up to 30 people, group Party Boats , 2 night trips to Sekotong and Desert Point for island hopping and surfing Lomboks most famous break Desert Point. They also run a 6 night trip to Moyo and Satonda where they visit waterfalls, a sunken volcano, caves, a crater lake, deserted beaches and uninhabited islands, stunning reefs and a WW2 wreck, a 5 night island hopping trip to Sumbawa and a Reef Check expedition twice per year. South Sea Nomads also run UV night diving on Gili Trawangan, Flyboardin and the Reef Check Training facility based at Manta Dive.
Perama are based near the art market on the main beach road. They offer trips all around Indonesia as well as trips from Bali to the Gilis and Komodo.