A semi-submarine is a boat with a lower cabin below the waterline, where seats face large windows onto the reef. It is the easiest way to see the coral, schools of fish and the occasional turtle without getting wet. The tour takes about one and a half to two hours including a transfer from your hotel, and it is rated 4.7 from a modest number of reviews. Glass-bottom boats are a related option on the same coast, and some operators combine the two, so read carefully for what is included. Visibility depends on the sea and the sun, with the best views on clear, calm mornings. The vessel does not dive, so there is no claustrophobia or pressure, and it suits wheelchairs and strollers less well because of the steps, so ask the operator about access if you need it.
How it works
You are collected at your hotel, driven to the departure marina, and board a vessel with an open deck above and a seated viewing cabin below. The captain cruises over a reef while a guide points out fish, coral and, with luck, turtles or rays. The cabin has air conditioning on many vessels, which is a relief in summer, and there is usually a chance to come up on deck to take photographs in the open air.
Who should choose it
The semi-submarine is a good rest-day activity after a big snorkeling day, a safe option for children who are nervous in the water and a comfortable way for older relatives to see the reef. It is less exciting than snorkeling, as you look through glass at a distance rather than swimming among the fish, and a cloudy or windy day lowers visibility. Photos through the glass are better if you hold your phone flat against the window.
Practical tips
Book the earliest slot, as the light is best and the sea calmer. Bring a light layer for the air conditioning, sunscreen for the deck, and a little cash for tips. Rules on drinks, shoes and bags vary by operator, so check with the operator. Read recent comments, and if you prefer a larger choice of operators, compare the glass-bottom boat options sold in Naama Bay. If the sea is rough, operators can cancel, so keep your plans flexible.
What to expect
The experience
A seated reef tour on a semi-submersible boat with underwater windows, including a hotel transfer.
Best time
Clear, calm mornings give the best underwater visibility and light.
How long
About one and a half to two hours including the transfer.
Tips
Book the earliest slot, bring a light layer for the cabin and sunscreen for the deck, and ask about access if mobility is an issue.
Quick picks
- Best for
- Anyone who wants to see the reef without swimming, including young children and older travellers.
- Families
- Excellent for kids who are shy of the water, and short enough for little attention spans.
- Couples
- A relaxed, easy outing for a rest day between bigger trips.
- Pair with
- A buffet lunch on Naama Bay or an evening promenade.
- Time needed
- Half a day at most.
Good questions
Do I get wet on a semi-submarine?+
No, you sit in a cabin below the waterline behind glass. There is usually an open deck above, where spray is the only wetness.
How good is the visibility?+
It depends on the sun and sea. Clear, calm mornings are the best, while cloud or wind reduces what you can see.
Is it suitable for toddlers?+
Yes, many families bring young children because there is no swimming involved. Keep a close hold on small children on the deck.
Is a glass-bottom boat the same thing?+
They are similar, but a glass-bottom boat has a window in the hull while a semi-submarine has a cabin below the waterline. Check which one your tour offers.
Is transfer included?+
Yes, a hotel transfer is included. Give your hotel name when you confirm and note the pickup time the operator sends.
