Two different arrangements
With a private charter, your group uses the whole boat under the agreed terms. On a shared trip, you book individual places. Compare the boat type and capacity as well as the price.
What is actually included?
Ask about food, drinks, fuel, skipper, transfers and any extra charges. A sailing boat in a photograph does not guarantee a set amount of sailing time.
Keep the route realistic
Stops and route may change with conditions and the operator's decision. Confirm the meeting point and return time, and leave enough time before other activities.
You send the message yourself in WhatsApp. This is an enquiry, not a booking, price or availability confirmation.