This cargo boat offers a weekly service between Honiara and Gizo via Marovo Lagoon (Mbunikalo, Batuna, Chea, Seghe). The Honiara–Gizo trip costs S$480 on the deck (S$1490 per cabin) and takes about 27 hours (10 to 13 hours to Marovo Lagoon). Deck passage to Mbunikalo is S$380. It generally leaves Honiara on Sunday morning (return on Tuesday); check while you’re there.
The ticketing office is across the road from the cathedral but tickets are also sold on board.