There's nothing quite as exhilarating as boating: the wind in your hair, the thrum of the wake against the hull, the snap of the mainsail and the buzz of an outbound fishing line.

It's no wonder 75 million people in the U.S. participate in recreational boating, according to 2010 data from the National Marine Manufacturers Association.

Where there are boaters, insurers will surely follow. A wide range of property and casualty companies offer boat insurance, including Allstate, Geico, The Hanover Insurance Group, Progressive, State Farm and Travelers.

It's easy to feel over your head when it comes to obtaining the proper insurance for your boat. That's because boats are a bit of an odd duck in the insurance world: Insuring a runabout has much in common with buying auto insurance while insuring a million-dollar yacht more closely resembles buying home insurance for a small house.

We assembled three knowledgeable insurance experts to answer six important questions about boat insurance.

Why Do I Need Boat Insurance?

If you're new to boating, you may be under the impression that your homeowners insurance will magically stretch to cover your boat. Sadly, in most cases it won't.

"Many homeowners policies will have a minimal amount of coverage for really small boats with either no engine or a very small engine, like a sailboat," says Mitch Jawitz, vice president of marketing and distribution at The Hanover Insurance Group. "But if you're buying a $10,000 or $20,000 boat, your homeowners policy is not going to cover you for what you need."

Lynne McChristian, the Florida representative for the Insurance Information Institute, says boats are unique and require their own policy.

"Your boat has nothing to do with your home, any more than your car can be covered under your homeowners insurance," she says. "Your home isn't mobile. Your boat, like your car, can go anywhere, so it requires a separate policy."

That said, you may save money by bundling your boat policy with your home or auto insurance.

"There's often a cross-sell discount," says Chantal Cyr, vice president of product management for Travelers. "At Travelers, if your boat is less than 30 feet and you have one or more policies, you can save 10% for one policy and 15% for the second."

How Does it Differ From Home or Auto Insurance?

In some ways, boat insurance is a mash-up of home and auto insurance.

Like home insurance, a boat policy covers you for liability if someone is injured on your craft and gives you the choice between replacement cost or cash value in a total loss.

Like auto insurance, boat coverage typically includes coverage for bodily injury that your boat inflicts on others, property damage your boat inflicts on docks and other boats, and physical damage to your boat should you hit something or run aground. You can also purchase comprehensive coverage against theft, vandalism, fire and flood, personal property coverage for your fishing gear, uninsured boater insurance and even roadside assistance in the event you need a tow.

Unlike home and auto, a boat policy may allow you to "lay up" or suspend coverage for specified periods when you're not using the boat.

"Sometimes boaters aren't aware of that and (on) some nice day in November, they take the boat out for the day and have an unfortunate incident, only to find out that their boat was to be out of the water from Oct. 15 to April 1," says Cyr.

How Do 'Agreed Value' and 'Market Value' Policies Differ?

"A boat is a lot like a car. The moment you drive it off the lot, it starts depreciating," says Cyr.

To help boaters save money on insuring older vessels, insurers offer the option of "agreed value" (think sticker price) versus "market value" (think depreciation) in the case of a total loss.

"With agreed value, the insured and insurer agree on the value of the boat upfront. If something happens to the boat, you're going to get paid up to the agreed value," says Jawitz.

"With market value, the boat depreciates; so if the boat is destroyed, you're going to get enough money to replace the boat's (current) value. If you bought the boat in 2005, you're not going to get enough money to buy a 2011 model; you're going to get enough to buy a 2005 model," he says.

Like most insurers, Travelers offers a steep discount (25%) with market value policies.

"Owners of newer boats typically go with agreed value. As the boat ages and the value depreciates, and they don't have a loan on the boat, you'll see them switch to cash value," Cyr says.

Strangely enough, yes -- but not by your boat policy.

"When the boat is attached to your car or truck, you are covered by your auto policy should you back into somebody," says Jawitz. "Anytime you're trailering something, the car policy overrides."

The bad news is it's covered solely by your auto policy, and only to the limits contained therein.

"A yacht policy will not pay for loss of life, bodily injury or property damage that occurs when the insured property is being transported on land," says McChristian.

Your homeowners insurance may provide limited coverage if the boat is damaged while parked on your property, but it may not stretch to cover stolen contents or vandalism.

To protect your boat (and your assets) from terrestrial liability, Jawitz recommends an umbrella policy.

"If someone gets injured, the umbrella policy would come on top of your auto and homeowners and cover you to the additional limits. If you have a boat, it's not only one more asset but it's another opportunity for risk. You want to make sure you're covered," he says.

Is My Boat Covered Everywhere?

Novice boaters may be unaware of the navigational limits on their boat insurance policy.

"Most policies contain a navigational warranty," says Cyr. "It's usually the inland waters of the U.S. and Canada or the coastal waters of the U.S. and Canada for smaller boats up to 26 feet. For larger craft, we have 22 territories that are defined by geographical points. For instance, one of them goes from Eastport, Maine, to Cape Hatteras, N.C.; another goes from Eastport, Maine, all the way around Florida to the panhandle."

Be sure your policy provides coverage where you want to roam. It may exclude certain areas for political or security reasons (think Somali pirates).

"If you want to do a one-time trip, we provide the ability for the one-time trip, but you need to check in with your agent to make sure you have the coverage provided," Cyr says.

Some policies offer an optional endorsement that helps pay to move your boat out of harm's way when a named storm approaches. Travelers pays 50% of the cost to move or haul your boat up to $1,000 per occurrence and $2,000 per policy term.

How Can I Save Money on Boat Insurance?

Now that you know the basics of boat insurance, let's dig for some savings.

  • Get specific. Don't buy a yacht policy if you own a dinghy. BoatInsurance.org lists 15 varieties of boat insurance, including powerboat, sailboat, houseboat, bass boat, wooden boat, fishing boat, pontoon boat, personal watercraft and so on, each with its own price structure and set of features. Shop around.
  • Go all-in on safety features. According to Cyr, many boat insurance underwriters offer policy discounts for gadgets that protect their investment, such as wireless auto tethers that act as an engine kill switch should the skipper or any of the passengers fall overboard.
  • Take a boating class. A trained boater is a safer boater. Contact your agent for discount-qualifying classes in your area. One class can save you 5% or more on your policy, year after boating year, Cyr says.
  • Extend your lay-up period. Insurers are willing to cut your premium during those days or months when you're not using your boat. "There is a premium discount of 4% per month off the hull portion of your total premium at Travelers," Cyr says