We require 24 hours notice prior to the check in time to change or cancel a reservation with no fee. For less than 24 hours notice you will be billed for the full price of the trip per person that is reserved. If a trip is canceled due to weather or unforeseen events, there will be no charge. For your safety: Please note that if have not been diving in over a year you will be required to dive with an instructor for your first dive at an additional cost. Also if you have not been diving in over 2 years you will be required to take a dive refresher course.