That region in the North Atlantic Ocean where ships mysteriously disappear has no connection to this puzzle. Except that this puzzle is no less mysterious. See for yourself. There are 6 elements in the frame and hardly any free space. The question is whether it is possible to fit yet another element - the small triangle - into the frame together with all the other pieces. As you've guessed, the answer is positive. This is a puzzle after all!
There is only 1 solution. Happy puzzling! Made by Russian designer Vladimir Krasnoukhov.