Mar do Rio is the largest company in the city to provide visitors with boat and diving trips around the oceanic islands of Rio's coast, the cagarras islands, rasa, Tijuca, redonda and Maricas.

The diving trips take place at night and depart in the morning for a swim in the famous ‘buenos aires' shipwreck, which is situated on Rasa Island, and are conducted in the Cabras Mar 37 vessel, which is fully adapted for diving, and has a cruising speed of 20 knots.