Orca are a dive resort who's head office is in Singapore and have a few dive resorts around the region including on Pulau Rawa. Rawa has everything - beautiful white sand, pretty beachfront villas, great food, and wonderful marine diversity only metres from the resort. Orca Scuba's instructors are based permanently on the island, so it's possible just to 'arrive-and-dive' but they recommend booking in advance to avoid disappointment.