Conventional scuba systems have some major limitations. Divers using them must carefully monitor the depth and time they stay underwater and endure a series of lengthy decompression steps during resurfacing. Rebreathers recycle air, allowing divers to go deeper and remain underwater for longer, with shorter decompression on ascent. The Navy has used the devices for decades, but they were very expensive, and difficult to maintain and operate. In 2008, VR Technology introduced the Sentinel, a $12,000 rebreather with automated safety systems and full manual backup. See how this scuba system works here.
Hundreds of soccer-ball-sized robot drones could soon ply the friendly waves to help scientists track ocean currents and harmful algae blooms, or even swarm to disaster sites such as oil spills and airplane crashes. That's no mere flight of fancy, now that the National Science Foundation has provided almost $1 million in funding to researchers at the Scripps Institution of Oceanography in San Diego.
This soft coral has branches of up to an inch long [shown here]. The animal, six inches tall and four inches wide, now lives in an aquarium at the Queensland Museum.
Last spring, scientists from the Queensland Museum in South Brisbane, Australia, discovered this new coral species hanging underneath a rocky ledge about 50 feet deep off the northern end of Australia's Lizard Island. They now hope to classify the coral, along with hundreds of other recently discovered marine invertebrates.
The aging Marine One helicopter fleet is finally due to retire. Meet its successor
By Jonathon KeatsPosted 05.01.2006 at 2:00 am 0 Comments
After decades of upgrades to a fleet of notoriously cramped Sikorsky VH-3 Sea Kings, the White House has tasked Lockheed Martin with a dramatic, $6.1-billion makeover of Marine One, the presidential helicopter, starting this summer. The goal: to fit a mobile Oval Office into the tight quarters of a chopper. The new fleet will consist of 23 VH-71 aircraft, each of which will have 200 square feet of cabin space, nearly double the Sea King´s 116.
Aside from the legroom, the copter will incorporate major upgrades to the old defense and communications