Your  policy is necessary to cover the costs of damages in the event of an accident. This includes damages to equipment or human life; your own, or of a third person involved. It is important to carefully examine the terms of your package to ensure maximum cover. If the cover is not enough, it might cost you a lot of money in case of an accident, or if your craft needs to be towed in for a repair. 

Most insurance companies should be able to get a quotation for you in a few minutes. You can check out their policies online, and even contact their consumer service executives and talk to an agent or email relevant questions before purchasing a policy. In most cases this will not take more than one work day. This facilitates immediate use of your boat after purchase. 

If your boat is not new it's fine to just opt for minimal coverage of the more costly and important boat parts so you've adequate coverage. A little bit of forethought can go a long way in saving you lolly that would otherwise have been spent on getting extensive coverage by choosing a high-premium and extended-use policy. You can select the crucial boat parts of the coverage and put a top price that you are willing to cough up for the cover so you are adequately but not over-covered. 

Adjustments to a boat insurance policy are always possible and you needn't spend your whole budget when you get the first quote; first, evaluate the true cash worth of the boat and then create an insurance product that suits it. 

You can get a multi-policy discount if you take coverage for different things from a from a single insurer; say for example an auto and house insurance from the same provider.