For local charters (within Singapore waters), mobile reception is obtainable based on our experience; although you may experience varying degrees of reception throughout the charter.

If however, your charter involves entering international waters, reception is dependent upon your own service provider and what your own arrangement is with them. Their respective charges may apply. We recommend that you check with your service provider before the charter. 
Kindly note that you are responsible for any charges you may incur from your provider.