Private Sailing St Thomas: 40ft Cosmos Mariner
You handle the sails on a 40-foot designed-for-sailing boat, not a tour vessel.
Private sailing activity on St Thomas and St John aboard the Cosmos Mariner, a 40-foot pilothouse sailboat. You sail the waters between the two islands for three hours with no fixed stops. The day is yours to shape. Beverages, snacks and easy dock boarding are included. Request a snorkel stop and the crew will add one.
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The Cosmos Mariner is a 40-foot Robert Perry design built for sailing, which means the boat responds to what you ask of it instead of running a set route. You're on the water for three hours, moving through the waters between St Thomas and St John with no mandatory stops. If you want to learn something about sailing, the crew teaches. If you want to simply be underway, that's the day you get. A snorkel stop is available on request: mention it when you book and the crew builds it in.
Boarding happens at Sapphire Marina with easy dock access. The boat carries soda, bottled water, beer and wine, plus snacks for the afternoon. What you don't get is a fixed itinerary or a series of named attractions to check off. This is sailing, not sightseeing from a boat.
What’s included
- Soda and bottled water.
- beer and wine.
- snacks.
- easy boarding access at the dock.
Options for this experience
2 optionsBefore you book
Prices and times updated 3 days ago
Operated by Sailing The Cosmos Charters
Is this one for you?Book the private option if your group wants the boat to itself and the freedom to shape the afternoon: shared departures mean other passengers set some of the pace. The three-hour window works best if you're looking for a sailing experience rather than a full-day island tour.
Traveler reviews
Top questions
What happens if it rains?
It may be canceled due to bad weather. If that happens, you're offered another date or a refund. Free cancellation up to 24 h before the start.
Can I add snorkeling to a private sailing trip on the Cosmos Mariner?
Yes. The boat includes snorkeling stops on request, so let the crew know when you book and they'll work one into your three hours on the water.
What's the difference between the two Simply Sailing options?
Simply Sailing the USVI is a shared departure. Simply Sailing the USVI Private books the entire boat for your group alone, so you set the pace and the stops.
What happens if I've never sailed before?
The crew is happy to teach if that's what you want, or you can sit back and enjoy the ride. The trip is built around what your group is after.
Does the boat stop at beaches or islands?
Not unless you request it. The Cosmos Mariner sails the waters between St Thomas and St John with no fixed stops, so the day is open water unless you ask for a snorkel site.
Private Sailing St Thomas: 40ft Cosmos Mariner
3h
from US$ 799 per group
5.0019 reviewsVerified traveler reviews via our booking provider









