The boat, the trailer, and what's inside it.

Sometimes, and it is worth establishing rather than assuming, because there are three plausible answers and all of them occur.

The trailer may be included on the boat policy, it may be listed separately on it, or it may sit on the auto policy instead, and occasionally it turns out to be on none of them. A trailer is property in its own right, it has real value, and it is a theft target on its own without a boat on it. The same question applies to what is stowed in the boat. Electronics, water toys, skis, rods and safety gear are handled inconsistently, and contents on a boat are commonly the part that turns out to be uninsured after a loss. The useful step is to establish which policy carries each of the three and what limit applies to it, which takes a few minutes with your declarations pages in front of you.

More than most owners have thought about, and it is a different shape from the liability on a car.

A boat commonly carries people who are not members of your household, frequently including other people's children, on water shared with other operators, and the person in charge of the vessel carries responsibility for what happens. That is closer to hosting than to driving, and injuries on or in water can be serious. The liability limit on a boat policy is rarely a figure anybody chose deliberately, and it is usually the default that came with the policy. It is also the exposure a personal umbrella is best suited to lifting, because an umbrella sits above several underlying policies at once. The order matters though. Umbrella carriers require specific underlying limits on the boat policy before they will sit on top of it, so the boat limit has to be right first.

It can, and this is worth knowing before the season ends rather than after something happens over the winter.

Some policies reduce coverage during a lay-up period, on the reasonable basis that a boat in storage cannot have a collision. Some require particular storage arrangements as a condition. Some are unchanged. Which applies to yours is stated in the policy rather than being a matter of practice. It matters because a substantial share of boat losses happen while the vessel is not in use. Theft from a storage lot, weather damage, and damage to a boat left uncovered or improperly winterised are all off-season events. Where the boat is stored is also an underwriting question rather than a formality, and a marina, a commercial storage lot, your own garage and a friend's barn are four genuinely different answers to a carrier.

It depends on the item, and the honest answer is that a household usually needs a mixture rather than one approach applied to everything.

Scheduling onto an existing policy suits items that are essentially valuable property, that do not move under their own power, and where the main exposure is theft or damage. A standalone policy suits anything that operates, carries a passenger, leaves the property under its own power or creates liability while in use, because those exposures are what a purpose-built form is written around and what a homeowners contents sublimit is not. The practical test is to ask what happens if the item hurts somebody rather than what happens if it is stolen. Where the answer to the first question is serious, a standalone policy is usually the right home. We are happy to go through the list item by item and tell you which is which, including where the answer is that what you already have is fine.

It depends on the item and on the policy, and this is one of the more common ways a claim turns into an argument.

Coverage on many recreational policies follows the item rather than the person, so a friend or family member using it with your permission is often covered in the same way a permitted driver is on a car policy. But that is a general shape rather than a rule, it varies between forms, and some policies limit or exclude use by people who are not named. Regular use by the same person is a different question again from an occasional loan, and someone who uses your boat or your side-by-side most weekends is closer to an operator the carrier would expect to know about. The safest approach is to tell us who actually uses each thing, because it costs nothing to have it set up correctly and it is a bad conversation to have after somebody is hurt.

Sometimes the honest answer is no, and we would rather say so than sell you something.

A modest item that never leaves the property, that would not seriously injure anybody, and that sits comfortably under your existing contents coverage may genuinely be fine where it is. What changes the answer is not how often it is used but what it can do. Something that carries a passenger, reaches a real speed, tows something, goes on public water or leaves the property under its own power creates a liability exposure that exists whether it is used once a year or every weekend, and that exposure does not scale down with usage. There is a second thing worth weighing. Items used infrequently spend most of the year in storage, which is where a great many theft and weather losses actually happen, and where coverage differences between policies show up most clearly.