gCaptain.com

The Guardian tells us:

A nuclear-powered Royal Navy submarine needed £5m worth of repairs after it struck the seabed because a piece of tracing paper covered its navigational chart, investigators have found.

The tracing paper had been used on the chart to protect it from being written on, obscuring vital information.

HMS Trafalgar was grounded near the Isle of Skye in October 2002 because of basic navigational errors during a training exercise for students, according to the official board of inquiry report, which has been released under a freedom of information request.

According to the report, just 90 seconds before the boat hit the seabed, a crew member realised what was about to happen and was recorded as saying: “We’re going to have to change course. This is too dangerous.”

TSSBP gives us a bit of insight:

To me, this wasn’t really a “training aid”-induced accident; I think all boats used tracing paper over charts when you were staying in the same small area for a long time with lots of maneuvering, whether you were doing PCO Ops or not. All submariners, I’m sure, have good stories about where training aids actually contributed to real-world casualties; unfortunately, all of mine happened back aft, so I can’t talk about them.

While The Lone Voice captures our sentiment in this post:

The involvement of unsupervised student submariners in the navigation procedures and the use of tracing paper on the chart were criticised heavily by the board.

Experts attempting to understand the strategic aims behind China’s aggressive military expansion have generally focused on Taiwan. But a new naval base points at Beijing’s significant and growing interest in projecting power into waters far from the Taiwan Strait.

The new underground base for submarines and comfortable facilities that would attract technically proficient soldiers and sailors. Its location will allow China to exert greater dominance over disputed territories of the South China Sea; to place a much larger naval force closer to sea lanes crucial to Asia’s commercial lifeblood; and to exercise influence over the critical Straits of Malacca. (Source: Wall Street Journal - NPR Audio)

If you think that it is no big deal that China is building submarines at an alarming rate take a look at this video of an Australian Navy torpedo test.

And if you think the US Navy has the ability to protect Merchant Shipping against this kind of attack first ask: can they protect themselves?

If not can they at least protect the US Mainland and that of our allies against China’s new boomers?

Details:

The Royal Australian Navy (RAN) sunk HMAS Torrens on June 14th 1999 with a single Mk48 wire guided torpedo fired from the Collins Class submarine Farncomb. Torrens was the last of six Australian ‘River Class’ Type 12 Destroyer-Escort, the others (Derwent, Parramatta, Stuart, Swan and Yarra) having been disposed of previously. Before the sinking Torrens had been thoroughly cleaned of all fuels, oils and potentially environmentally harmful substances. Her gun turret was donated to the South Western City of Albany. Torrens was then towed from Fleet Base West (HMAS Stirling) 90km out to sea, west of Perth. The submarine Farncomb fired the torpedo at the stationary target from a submerged position over the horizon . (Source: BTInternet)

For the science behind the explosion click HERE.

Video:

The USCG has intercepted another DIY Semi-Submersible operated by drug smugglers. CNN tells us:

In the past three months the Coast Guard has learned of more semi-submersible vessels smuggling drugs than it did in the previous six years, when there were 23 cases, officials said.

U.S. Coast Guard intelligence officers predict 85 cases this year and 120 next year.

In some instances, the semi-subs are towed behind other vessels and are scuttled if they are detected, Allen said. Authorities are investigating reports that some semi-subs are unmanned and are operated remotely, he said.

Diplomatic agreements give the U.S. Coast Guard drug-interdiction jurisdiction in partner countries’ waters.

Encounters have become so frequent — and the dangers of boarding the vessels so pronounced — that the Coast Guard is pushing for legislation that would make the use of “unflagged” semi-submersibles in international waters a crime punishable by up to 20 years in prison, even if authorities can’t recover drug evidence because the smugglers scuttle the transports.

“There’s really no legitimate use for a vessel like this,” Allen said.

Earlier this year Eaglespeak and Coast Guard News gave us tour of a similar design:

Despite the cool factor these submarines have one fatal flaw that makes them poor candidates for smuggling efforts. ZeroSix fills us in:

The main problem with real subs is that they are not much more effective than the “semi-submersibles” that are coming out of Colombia (and even Europe). Submarines can only travel underwater, on battery power, for a short time. Otherwise, they are on the surface, or in a “semi-submersible” state, running on diesel power.

The most stunning failure, however, has to be the 100-foot vessel found inside a Bogota warehouse in 2000. The BBC reported:

Police in Colombia say they have found a half-built submarine in a warehouse in a suburb of the capital Bogota.

Police chief General Luis Ernesto Gilibert said Russian documents were found alongside the partially-completed vessel.

He said the 30 metre (100ft) vessel would have been capable of carrying huge quantities of cocaine or heroin.

He speculated that, once completed, the submarine would have been disassembled and taken by lorry to to Colombia’s Pacific or Caribbean coast.

To learn how to build your own submarine check out SubmarineBoat’s Link Page, just make sure to avoid any large ships during the trial run. A warning this NYC artist most likely ignored.

No this isn’t going to be a post about china’s new submarines…. instead we look at designing ships to be quite for more relaxing purposes.

Eurodam News, Holland America’s newbuild blog, shares the secret;

When Zuiderdam, the first Vista-class ship, entered service, it quickly became evident that the aft part of the main restaurant had higher-than-usual noise and vibration levels. On all Holland America ships the aft section of the main restaurant is located above the propellers, but on Vista-class ships the main restaurant was located three decks lower and therefore is closer to the propellers.

Fincantieri engaged Danish consulting company Odegaard & Danneskiold-Samsoe to work with the shipyard’s noise and vibration department to develop a solution. They hit on the idea of installing an air-injection system that would create a cushion of air bubbles between the propellers and the hull to absorb some of the noise frequencies that would otherwise be transferred directly to the hull. A similar system had been installed on private yachts before, but the technology had never been tried on a large cruise vessel.

For the rest of the article click HERE.

This article was originally posted in October 2007