My first day out. staying at GCP you are a 2 minute walk to the cruise ship terminal( one tip - you will need to stop and pay a 20 peso departure fee, you will find this to the right of Gate 9, then you must go through security, it appears you could be smuggling an atomic bomb however if you have brought your dive knife for you excursion be prepared to have it taken from you, with no apologies or exceptions. they will however take your knife from you and proceed to then take it and leave it with Vallarta Adventures, this system needs to have an updated process, as my bag was not searched at all just focused on the knife) Once this procedure is done- you are lined up with everyone heading out to board the boat. As a scuba diver you are serviced first. the large double decker boat, carrying 100+ people , for your 1.5hr ride to Marietas or las calentes. On the way we were entertained by staff and crew- the comedy was fun as well as being provided an extensive briefing on the boat, as well as provided unlimited drinks coffee and delicious fruit and muffins. Kieran the dive instructor provided thorough and detailed information of the dives we were going to see. he assisted with all equipment for everyone all was handled and set up cleaned and rinsed all gear for you so you could relax and be entertained, we witnessed the mating of humpback whales on the way which was one of the bonuses of my trip. On our trip to LC the four divers I was there with all had the opportunity to dive with the Seal Lions as they are just about to open a Sea Lion adventure on LC beach , we were underwater and were able to interact with them.Keep in mind, this is a Long day trip aprox 7hr day, but there is lunch and an open bar that helped with managing the long day. On each dive the the staff were all amazing and I highly recommend diving with them. Do not however, expect the visibility of these dives to compare to mayan riviera or hawaii, but a very good experience you will have if or should I say when you go have a blast..