Page 8. MAINE COASTAL NEWS July 2015 U. S. NAVY NEWS Continued from Page 7. mission.”


GHWB crew has been preparing for its shipyard period since returning from a nine- month deployment to the U.S. 5th and 6th Fleet areas of responsibility in November.


PNSY Safely Docks


USS Annapolis for Overhaul From Portsmouth Naval Shipyard Public Affairs


KITTERY, Maine (NNS) -- Portsmouth Naval Shipyard (PNSY) workers safely dry- docked USS Annapolis (SSN 760) June 15 for planned maintenance work and several system upgrades.


Annapolis arrived at PNSY April 25, and the dry-docking of the submarine is part of a greater engineering overhaul scheduled to last 23 months.


More than a year prior to Annapolis’ arrival, the shipyard assembled a project planning team comprised of individuals from engineering and production depart- ments. The team developed a detailed plan for this maintenance availability to ensure a successful overhaul for Annapolis and the shipyard.


Attack submarines like Annapolis have multi-faceted missions. They use their stealth, persistence, agility, and fi repower to deploy and support special force operations, disrupt and destroy an adversary’s military and economic operations at sea, provide early strike from close proximity, and ensure undersea superiority.


Portsmouth Naval Shipyard is the


Navy’s center of excellence for attack sub- marine overhaul, repair and modernization. As a fi eld activity of NAVSEA, PNSY is committed to maximizing the material readiness of the fl eet by continuing to safely deliver fi rst-time quality work, on time and on budget.


ONR Testing High-Speed Planing Hulls By Katherine H. Crawford, Offi ce of Naval Research Public Affairs


ARLINGTON, VA (NNS) -- Earlier this month, scientists sponsored by the Offi ce of Naval Research (ONR) performed ex-


periments to better understand the motions, forces and pressures generated by waves on boats with high-speed planning hulls. Planning hulls are like those used on a speedboat - they’re designed to produce lift and allow the watercraft to glide on top of the water, skimming more quickly over its surface. At higher speeds, waves become a problem. The higher the crests of the waves, the more the boat will rise to the top of the wave and then fall back down to the wave’s trough with great force. This is known as “wave slam.”


“When a hull is going at speed and it hits


a wave, it’s like hitting a wall - it’s a violent collision, and the forces are very large,” said Dr. Bob Brizzolara, a program offi cer with ONR’s Sea Warfare and Weapons De- partment. “This causes injuries to Sailors - commonly back and leg injuries - and also can degrade the structure of the vessel.” This research was motivated by a series of workshops ONR program offi cers held with personnel from the Navy small com- batant craft commands about high-priority challenges that ONR could help with. One identifi ed challenge was the need to carry greater loads while maintaining their speed capabilities. To do this, some structural weight would need to be shed. Since the hull is the heaviest part of a vessel, Brizzolara and his team began there, investigating ways to save weight. “To deal with the effects of wave slams, the Navy must have strong boats that are forced to reduce speed in higher seas,” said Dr. Carolyn Judge, an associate professor in the U.S. Naval Academy (USNA)’s Naval Architecture and Ocean Engineering Department, as well as a current Young In- vestigator Program recipient working with Brizzolara on this research. “Mitigating the problem of wave slams will allow Navy boats to travel faster in higher seas states as well as allow for lighter boat structural designs.” Working with Naval Surface Warfare Center (NSWC) Carderock Division, USNA and the University of Iowa, ONR is consid- ering ways to reduce hull weight while main- taining structural adequacy. For unmanned craft, it might be possible to reduce weight


at the Tall Ships Portland There are two ways to come aboard on Saturday, July 18th


Come Aboard Bowdoin


The First Way: Attend the reception Tours will be offered during a reception hosted by Maine Maritime Academy and Captain Alec Schoettle and his crew on Saturday, July 18th from 5:00 – 7:00 pm. at the Portland Yacht Services located at 58 Fore Street, Portland, Maine (next door to Sail Maine). You are invited to join us for tours, refreshments and entertainment provided by singer- songwriter Larry Kaplan. The Second Way: Firsthand experience aboard Bowdoin as she leads the Parade of Sail into Portland Harbor Between now and June 30th, the top fi ve donors to the Bowdoin Centennial Campaign will be invited, along with one guest, to sail aboard for the day as she leads the Parade of Sail into Portland Harbor for Tall Ships Portland. You may give online at mainemaritime.edu/support- mma, and please designate “Bowdoin Centennial Campaign. Checks should be made payable to Maine Maritime Academy, designated Bowdoin Centennial Campaign on the memo line, and mailed to MMA, Development Offi ce, 1 Pleasant Street, Castine, ME 04420. campaign pledges received on or before June 30th will also be eligible.


Any


For more information or to RSVP for the reception, please contact Kay Hightower at kay.hightower@mma.edu or by calling 207-326-8932.


WEST BETHESDA, Md. (April 3, 2015) A ship hull model attached to a high-speed sled moves through waves at the David Taylor Model Basin at Naval Surface Warfare Center, Carderock, during Offi ce of Naval Research -sponsored research. The research studies the fundamental physics of the water-impact of high-speed planing hulls and to measure the slamming loads and resulting motions of the craft upon re-entry into the water. (U.S. Navy photo by John F. Williams/Released)


even further, allowing additional payload to be carried. “We’re working to understand the pres- sures on the hull that are due to the wave slamming, since right now, they are not well understood,” Brizzolara said. “We’d like to be able to save weight in the structure so we can carry more fuel and payload, but we don’t understand those pressures well enough to be able to start taking weight out of the structures.”


The team is executing the research in two parts: experimentally with scale models and using computer simulations. The scale models are tested in the large tow tank at NSWC Carderock.


Computer simulations for planing hulls are being developed by the University of Iowa, a challenging problem due to the com- plexity of planing hull physics. The model results will be used to develop computer simulations that are more realistic and accu- rate. This will vastly increase the numbers of tests that can be run since the computer simulations are much less expensive than experimental testing.


ONR provides the science and tech- nology necessary to maintain the Navy and Marine Corps’ technological advantage. Through its affi liates, ONR is a leader in science and technology with engagement in 50 states, 55 countries, 634 institutions of higher learning and nonprofi t institutions, and more than 960 industry partners. ONR, through its commands, including headquar- ters, ONR Global and the Naval Research Laboratory in Washington, D.C., employs


more than 3,800 people, comprising uni- formed, civilian and contract personnel.


Secretary of the Navy Names Virgin- ia-Class Submarine USS New Jersey From the U.S. Department of Defense, Offi ce of the Assistant Secretary of Defense (Public Affairs)


WASHINGTON (NNS) -- Secretary of the Navy Ray Mabus hosted a ship-naming cer- emony May 24 in Jersey City, New Jersey, to announce that SSN 796, a Virginia-class attack submarine, will bear the name USS New Jersey.


Mabus told the audience the submarine will be named to honor the long-standing history its namesake state has had with the Navy. New Jersey was where USS Holland, the Navy’s fi rst submarine, was designed and constructed in October 1900. “New Jersey’s relationship with our Navy has been defi ned by innovation, lead- ership, and courage- in conquest and in com- bat.” said Mabus. “The name of our newest nuclear-powered fast-attack submarine will carry on that strong tradition.” Since the creation of that fi rst subma- rine, two naval ships have been named New Jersey, a battleship commissioned in 1906 which was part of the famed Great White Fleet and another battleship commissioned in 1943, making SSN 796 the third naval ship to bear the name New Jersey. “As we sail deeper into the 21st century it is time for another USS New Jersey, time


Continued on Page 9. Southport Announces Continued from Page 6.


and performance available from modern outboards.


Southport was developed to utilize the weight of modern twin power outboards to provide a soft, dry ride, stable platform, and easy handling. The unique design of the hull allows the boat to jump up on plane with- out bow rise, delivers a surprisingly agile ride, and turns on a dime. Ask a Southport owner about the ride of their boat and you will hear repeated praise about its balance, responsiveness and superb handling – often summarized as “Simply Amazing”. In every Southport you’ll fi nd electrical systems designed in a yacht-like manner, scuppers that evacuate green water like a custom sportfi sh, rugged offshore T-tops and subtle comfort throughout the interior, all this with lines that refl ect some of the most


beautiful products afl oat. In 2011, Southport Boats became part of the Kenway Corporation, located in Augusta, Maine where a team of expe- rienced Maine boat builders ensures that the construction of every boat matches the outstanding performance of the hull design. Not only are Southport boats constructed with the highest quality gel coats, adhesives and composite materials, but now they are being built using modern vacuum infusion technology which provides a stronger higher quality product that makes a great boat even better.


The combination of legendary hull performance, beautiful lines, and modern construction make Southport the most de- sirable boat in its class. And it goes without saying that Southport Boats are the premier offshore fi shing machine.


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