Snag-A-Slip Partners with Swell AdvantageSwell Advantage, a highly advanced marina management software, and Snag-A-Slip, a leading boat slip reservation system, announced their new partnership to better service marinas and waterfronts across America and Canada. Together they will provide boaters with a convenient, simple and fully integrated customer service experience.With the recreational boating industry experiencing a boom in growth and competition, marina managers and owners are looking for modern tools. This team of experts will help manage the new generation of boaters. Learn more at swelladvantage.com[caption id="attachment_324923" align="alignright" width="300"]
Courtesy of Sea Isle Marina[/caption]Oasis Marinas Property to Host Miami Boat ShowSea Isle Marina, an Oasis managed property, is set to host this year's Miami International Boat Show. Taking place February 16-20, seminars, educational programs and exhibits will be held at locations including Sea Isle Marina, Herald Plaza, Island Gardens Marina and Miami Beach Convention Center. Visit snagaslip.com to snatch great deals on Miami slip rentals.Saunders Yachtworks Named Alabama's Clean & Resilient MarinaThis squeaky-clean yacht yard located in the Gulf Shores of Alabama earned the state's first Clean and Resilient Marina award from the Mississippi- Alabama Sea Grant Consortium. Saunders Yachtworks has been in business for 62 years and has exceeded Environmental Protection Agency requirements for efforts such as effluent control and runoff elimination. For more information visit saundersyacht.comThe British Virgin Islands Are Fully Open!Plan your escape to paradise from anywhere in the world now that the BVI has reopened for all international travel. With common COVID requirements such as proof of vaccination, negative tests or quarantining, you can now easily plan trips through BVI tourism and Marinalife's Priceline portal. For more info, visit bvitourism.com
2021 Photo Contest Winners
We are proud to present the winners of the past year's Life on the Water Photography Contest. After receiving triple the amount of submissions as the previous year, it was not easy selecting our final images captured by so many talented photographers. Check out our top prize winners here.This year's contest was sponsored by Sunbrella.
Upcoming Boat Shows
St. Petersburg Power & Sailboat ShowSt. Petersburg, FLJanuary 20-23, 2022The Chesapeake Bay Boat ShowPresented by the Marine Trades Association of Baltimore CountyTimonium, MDJanuary 21-23, 2022Miami International Boat ShowMiami, FLFebruary 16-20, 2022Palm Beach International Boat ShowWest Palm Beach, FLMarch 24-27, 2022
It’s the moment you have all been waiting for… time to vote for your favorite marina! Cast your ballot for the top marinas of 2022. You can now vote for Best Large Marina (more than 100 slips) and Best Small Marina (less than 100 slips). Submit your selections by the form below by October 1, 2022.
World events over the last two years have created a record high interest in recreational boating, but unfortunately they also generated record high fuel prices. To help you understand exactly how various boats burn fuel differently and how to run your boat at its most efficient, we’re turning to Steve Zimmerman, founder of Zimmerman Marine, a highly respected boat yard and boat builder with six locations in the Mid-Atlantic and Southeast.
Steve is knowledgeable in all aspects of boat maintenance and design that affect fuel consumption. I had the opportunity to ask Steve recently to dispel commonly held misconceptions about fuel use in popular styles of recreational boats.
Bob: When boaters talk about fuel consumption, they mostly speak in terms of gallons per hour, not miles per gallon. What’s the difference?
Steve: Many boaters focus solely on gallons per hour (GPH); however, in determining how much fuel you use to cover a given distance on your boat, we have to bring speed into the equation. For example, if someone asked which is more efficient, a boat burning 11 GPH or a boat burning 22 GPH? The answer is it’s impossible to say without calculating miles per gallon (MPG)
If the boat burning 11 GPH is traveling at 10 knots (nautical miles per hour), we divide 11 GPH by 10 knots to see it is getting 0.9 nautical miles per gallon (nMPG). If the boat burning 22 GPH is traveling at 22 knots, 22 divided by 22 equals 1.0 nMPG. So, in this example, we see that although the difference is minor, the boat burning double the gallons per hour achieves better mileage.
Bob: If people are considering a new boat, are some designs more fuel efficient than others?
Steve: All boat hulls require a certain amount of energy to move through water. The more easily they move through the water, the less energy is required. The primary factors that influence how easily the hull can be moved include hull shape, length, total weight and drag. Hull shapes are sorted into three basic categories: full displacement, semi-displacement and planing. To determine which offers the best fuel economy, we introduce the most important variable of all: speed.
Bob: So, the faster a boat goes, the more fuel it burns?
Steve: Usually that’s true, but not always. Different hull forms respond differently to the demand for speed. As speed increases, boats move through the water in three basic ways. At slow speeds the boat sits fully in the water, riding between a wave at the bow and a wave at the stern. Full displacement boats live in this zone. As soon as speed increases, fuel burn rises sharply.
Semi-displacement and planing hulls can apply more horsepower and begin to climb up onto the bow wave. In this phase the bow rides awkwardly high, and fuel economy plummets. By applying even more power, these hulls ride more on top of the water. The bow comes down, speed increases, and fuel burn levels off. All get better fuel economy at the slower speeds, but the penalty for higher speeds varies substantially between hull types.
Bob: Can you explain how different hull types vary of fuel use?
Steve: Yes, let’s look at the most common hull forms used in recreational boats:
FULL DISPLACEMENT Let’s look at some actual numbers from a full-displacement trawler in the 40- to 50-foot range. At a speed of 7.5 knots, if it’s using 3 GPH, that equals 2.5 nMPG? If we push for a little more speed, the fuel burn changes, at 9 knots, burning 11 GPH, it’s down to 0.8 nMPG. Notice that by going just 1.5 knots slower, it’s using 300% less fuel.
SEMI-DISPLACEMENT Now let’s look at a semi-displacement boat of similar size. If this boat is going 8.5 knots and using 3.4 GPH, it’s getting 2.2 nMPG. If we increase to 10.5 knots, using 14.2 GPH, we’re down to 0.74 nMPG. Once again, going just 2 knots slower increases fuel economy 300%. If we push this boat into higher speeds though, the fuel burn differs significantly. At 15 knots, fuel use goes up dramatically to 23.5 GPH, and our efficiency is down to 0.64 nMPG. At 20 knots, using 35.0 GPH, we’re down to 0.57 nMPG. When more of the boat’s hull is on top of the water, the penalty for increases in speed diminishes dramatically and economy levels off. As speed increases, fuel economy will gradually decline in small increments.
PLANNING Finally, let’s look at a boat designed for speed, a lightweight planing hull. When going slowly at 7.5 knots, burning 2.6 GPH, that equals 2.9 nMPG. When we increase to 11.0 knots, burning 9.2 GPH, that lowers the fuel rate to 1.2 nMPG. At a top speed of 25.0 knots, burning 27.5 GPH, that gives only a small decrease in fuel burn to 0.9 nMPG.
Notice that at the slow displacement speeds, a slight increase in speed causes a large decrease in fuel economy. But once the boat is out of the water at planing speeds, a significant increase in speed had a smaller effect on fuel consumption.
It should also be pointed out that weight matters, but it matters considerably less at displacement speeds. A full displacement trawler can pack on the cruising weight without much of a penalty. The other hull types won’t pay a penalty at lower speeds, but at higher speeds the additional weight will take its toll.
Bob: Generally speaking, going slower saves fuel?
Steve: For all cruising powerboats, when it comes to fuel economy, speed trumps all other factors—but only at slow speeds. At full-displacement speeds going a knot or two slower can double or triple your fuel economy.
Among the things that influence fuel economy on planing hulls are the condition and cleanliness of the props and rudders, alignment of shafts, health of bearings and a fouled bottom. Once you are on plane, increases in speed matter far less, but the importance of a clean underbody and running gear matters far more. Don’t be misled by GPH, taking the extra step to calculate MPG, which ultimately determines overall fuel use.
The marina management company is pleased to announce its growth into New England with three Connecticut properties: Old Harbor Marina in Clinton, Mystic Point Marina in downtown Mystic and Glastonbury Marina (formerly Seaboard Marina) in Glastonbury.Since its founding on the East Coast in 2015, Oasis has spread out rapidly across the United States from the northern Great Lakes to southern Florida. The company is now stepping foot on the West Coast with plans to grow new team members and properties in the future. For updates, visit oasismarinas.com
Suntex Marinas Lands New Property in New York
Suntex Marinas, a premier marina owner and operator, is proud to announce its recent acquisition of Sunset Harbour in Long Island, NY. Situated along the South Shore, this 332-slip marina provides easy access to the lovely Great South Bay. Visit suntexmarinas.com
SWITLIK Life Rafts are Back for the Season
SWITLIK Life Rafts are back in stock, in every variety just in time for spring and summer boating. Short lead times are now offered on survival equipment, rafts and man overboard modules. For more than 100 years, this U.S.-based company has produced high quality safety equipment in Trenton, NJ. Visit switlik.com
Since 1977, Pursuit Boats has produced high-end, yacht-quality fishing and cruising vessels across tons of locations. Magnificently appointed and highly anticipated with possibilities for every angler, the OS 445 is Pursuit's largest boat yet. Prepare to cruise in liveaboard luxury with this season's new model. Visit pursuitboats.com or marinalife.com/pursuit-concierge-club
Marinalife Photo Contest
2022 Photo Contest Is Open for Submissions!
Marinalife is pleased to announce our third annual photo contest, where we welcome snapshots that capture moments of maritime merriment from photographers of all skill levels. For details, see page 16 or visit marinalife.com/2022PhotoContest