If you reached land safely, you will overcome your dilemma, but if you fell out of the boat or were upset by rough weather, it is a warning of serious difficulty due to indecision.
If you were rescued in your dream, or managed to swim to safety, success will follow hardship. [1]
If you reach land safely, you will overcome your troubles, but if you fall out of the boat, or if the boat should be upset by rough waves, then expect very serious difficulties. Even then you may swim to land, or be rescued, which would indicate ultimate success. [2]