Dive Locations

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Why are US submarine dive planes on the sail and UK submarines have them on the forward hull?

What's the relative merits of each location? UK nuclear boats seem to be basically US designs with UK reactors but why move the dive planes?

Basically, better depth control on the bow and better sonar detection on the sail.

Some U.S. boats have moved the planes to the bow.

"Once the boat is trimmed to more or less neutral buoyancy, the depth of the boat is controlled with the hydroplanes. To use the hydroplanes the boat requires speed to create a force on the tilted planes. At slow speeds, the fore hydroplanes are exclusively used to keep the boat at the required depth. The fore planes can be located on the hull near the bow or on the sail of the boat. Because bow mounted hydroplanes are located further from the center of gravity, the depth control is more accurate with these types. Arguments for locating the fore planes on the finn of the boat are (a) improved performance of the spherical sonar array in the bow because the fore hydroplanes generate noise and (b) bow mounted hydroplanes can be damaged during docking of the submarine. Penalties for placing the fore planes on the fin are (a) the operating gear takes up space in the fin where room badly is needed for the masts, (b) the ice breaking performance is decreased, (c) at periscope depth the planes are close to the surface so their performance is adversely affected by the surface turbulence and finally (d) the hydroplanes are closer to the center of gravity and are thus less effective. Note that while improving the Los Angeles class submarine (688I) the US Navy relocated the fore planes from the sail to the bow. At sufficiently high submerged speed (more than 12 knots), the fore planes are no longer needed to control the depth of the submarine. At these speeds, they are rotated in a neutral or slightly dive position. Because the fore planes generate noise, many submarines are capable of retracting the forward bow planes at high speeds. All this considering, we may conclude that (retractable) bow planes are more favorable. It may be added that the author is not aware of boats having both dive planes on the bow and on the sail. "

FF9 Dead Pepper Treasure Locations - Dive Spot 2


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Dive Locations

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Cape Activities | Shark Diving

The Last Word inspires the discovery of hidden gems. It is family owned, comprising a fabulous collection of private five star intimate hotels each one a different experience. They are set in locations along roads less travelled with local characters caring for your every need and made even more amazing by the same exacting standards of hospitality. Spend time in two, three or more of our intimate hotels, we offer additional services like:

Shark Diving

• Great White Shark cage diving
• Witness sharks breaching
• Dive with Blue and Mako sharks
• Superb shark diving locations


The Last Word team loves keeping their clients entertained while they are enjoy the luxury of the luxurious boutique hotels. Let us organise a shark diving adventure of a life time. Southern Africa is rated as offering some of the best shark diving locations in the world. In Cape Town there are many tour operators offering numerous different expeditions and diving trips. We will recommend and book the most suitable trip for guests staying at any of the Last Word Properties. The most popular are trips to Seal Island, Shark Alley and Dyer Island.

Sharks are possibly the most feared animals on earth and also the most misunderstood. See them in their natural habitat and get to know these fearsome creatures of the deep. The waters off the coast of Cape Town are teeming with Great Whites, Mako and Blue Sharks.

View the natural predations of these giant predators as they hunt seals and jump clean out of the water. See the sharks either from the safety of the boat, or for the more adventurous, don a wetsuit and goggles and view these awesome creatures underneath the water - from the safety of a cage of course!

Please note that shark diving activities are only available for guests staying at any of the Last Word Retreats.

Imagine a few days enjoying magnificent mountain views amid tranquil gardens in Cape Town's most exclusive suburbs Constantia and Bishopscourt, ultimate relaxation and romance right on the beach front at Long Beach, or simply a couple of nights wining and dining in South Africa's gourmet capital Franschhoek.

One of our luxury hotels:

The Last Word Franschhoek

For more information visit our website

http://www.thelastword.co.za

 

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Article by The Last Word

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Dive Locations


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