Hello, im going to make a short film. Actors and averything is ok but at least i need a boat or better a yacht. Have you got an idea, from where i get something like this?

Unless you know someone with a boat you're SOL. You will have to charter one in any event. Now, you never mentioned where you are or what size you are looking for. Row boat, sunfish, skiff, motor or sail? Lake or coastal vessel. Buy some drinks at your local yacht club and see who will offer you access. You never know....
Here on East Coast everyone took their craft out of the water a month or so ago.

Producers and Directors avoided filming on water like the plague because it results in failure to make a movie. Spielberg's Jaws is the exception, and, to a lesser extent, Cameron's The Abyss. It's your job to explore what works and what doesn't in a water shoot. You don't you can't just shoot on a boat.

Honestly, I thought this question was a joke. Boats are found on water. It's that simple.

Yachts are some of the most expensive toys on earth.

Your least expensive option for shooting several actors partying on a boat is perhaps renting a pontoon on a lake. A small sailboat would be better. Lakes are easier to shoot on. Oceans and Bays rock a lot. Lakes don't have sharks.

You would need a canoe or another boat for shots. Water proof cameras have become more affordable. You've yet to begin, and you're already in over your head.

If you're goal is story, you can buy B-roll of a yacht. Or you can find someone willing to let you film their yacht going in and out of dock. They might let some of your actors walk onto the boat.

But film your story inside a room. The actors say they're on a yacht. Have someone wearing a captain's hat, a woman in a bikini. Film indoors.

You can also try a green-screen.

If your goal is to learn how to shoot, then rent a fishing boat or a boat for group snorkeling tours. Shoot from it. Get on an inflatable raft, then shoot at the boat. Wear a life preserver, and shoot from the water up to the boat. Try underwater shots.

Get a SCUBA license and the right gear (flippers, masks, etc) for more underwater shooting experience.

If a yacht is for your story, then you do not need a yacht for this short film. Good luck!

Hey, first thank you very much for the helpful answers... didnt know that there is so much to attend :-)

well, i informed myselfe and now i know much more about it. We are doing the most away from water and rent a small yacht at http://www.yachtico.com/ . Think we will make just one or two scenes on this yacht so we dont need that much time and it wound be that expensive :-) hope we make it :-) :-)

I am ready , i have vast experience in stage darama