Owning a boat in Lake Atitlan, particularly if you have a real estate property on the waterfront is the best.. There is almost no boat on this big 150 km2 of water. Most of the Guatemalan waterfront owners have a boat which stay either at a mooring in front of their property, storage on the real estate property or at one of the two marinas you can find around Lake Atitlan.
The best when you own a waterfront property or any real estate in Lake Atitlan is to have boat.. Boats are great to waterski, to go fishing (black bass and carpes), to go to have lunch or dinner at one of the hotels or restaurants with a pier around the lake.
The best size boat are between 18ft to 21ft .. not to big not too small. Now in order to navigate you need a boat license, if you have one from your own country bringing it, it will help. Some times the marine does some controls. They first check the regular public boat to make sure they are not over loaded, that they are registered boat and the driver has his license, life jackets for the passengers and lights. More and more they are checking the private boat also and they might take your boat into custody if they think you are not complying with their requirements.
To get the license you need to register for one of the classes they have two times a year in Panajachel. If you have a house waterfront on Lake Atitlan and you want your guardian to handle your boat you should have him get his license.. Specially if you are considering doing vacation rentals it might be handy to have him able to take the people around.