Answer
First, pack sunscreen and a hat to protect yourself from the sun, as you'll spend a lot of time outdoors. A reusable water bottle is also a good idea to stay hydrated.
• Don't forget your swimwear and a towel, especially if your trip includes swimming or snorkeling. If you have your own snorkeling gear, bring it along; otherwise, check if your tour provides it.
• Also, it's wise to have a waterproof bag for your valuables, just in case of splashes or unexpected rain.
Confirm the departure pier, transfer time, boat type, passenger limits, life jackets, insurance and cancellation policy. Sea conditions during the southwest monsoon can alter routes or stop trips at short notice.
Prices, schedules, access rules and operating hours can change, so confirm the current details with the provider or relevant authority before travelling.