Underwater cameras showed that the artist was a small puffer fish who, using only his flapping fin, tirelessly worked day and night to carve the circular ridges. The unlikely artist – best known in Japan as a delicacy, albeit a potentially poisonous one – even takes small shells, cracks them, and lines the inner grooves of his sculpture as if decorating his piece. Further observation revealed that this “mysterious circle” was not just there to make the ocean floor look pretty. Attracted by the grooves and ridges, female puffer fish would find their way along the dark seabed to the male puffer fish where they would mate and lay eggs in the center of the circle. In fact, the scientists observed that the more ridges the circle contained, the more likely it was that the female would mate with the male. The little sea shells weren’t just in vain either. The observers believe that they serve as vital nutrients to the eggs as they hatch, and to the newborns.
Types of Boat
Banana boat (merchant)
Banana boat (recreational)
Crash rescue boat
Cutter (sailing boat)
Dredge a boat
Fishing boat (contemporary)
Fishing boat (traditional)
Full rigged pinnace
Great Lakes freighter
Kayak and Sea kayak
Motor Launch (naval)
Personal water craft (PWC)
Pinnace (ship’s boat)
Sea kayak and Kayak
Traditional fishing boats
Very Slender Vessel
Jan. 18, 2012 — In case there is any doubt about the size of the Italian cruise ship Costa Concordia and the scale of the problem rescue crews (and now salvage crews) face, this incredible satellite photograph of the cruise ship, on its side, has been released by Colorado-based Earth-observation company DigitalGlobe.
The Costa Concordia ran aground in shallow water off the Tuscan coast on Jan. 13, gouging a hole in her hull. 3,200 passengers were on board and, at time of writing, 11 people have been confirmed dead and two dozen remain missing.
DigitalGlobe operates three satellites — the Quickbird, Worldview-1 and Worldview-2 — all equipped with high-resolution cameras that capture detailed imagery for commercial use. This view of the cruise ship shows her on her side, half-submerged in 100-meter deep waters.
To give a sense of scale, the ship measures 290-meters (950 feet) long, that’s almost the length of three football fields end-to-end.
More Discovery News coverage of the Costa Concordia disaster:
Image credit: DigitalGlobe
Types of dinghy
Whaleboats are among the classic “pulling” (rowing) boats, with a sharp bow, fine stern lines and a canoe stern. Despite being somewhat more tippy, with less cargo capacity than prams, they row, motor and sail well because of their fine lines. Prior to the introduction of fibreglass as a construction material, dories were more popular because their ease of assembly and, thereby, lower cost.
Whitehall Rowboats were the water taxis of the late 1800s until the invention of the small gasoline outboard. Considered one of the most refined rowboats for harbour and lake use, Whitehall Rowboats are a descendant of the Captain’s Gig which was used for a similar purpose on a naval vessel.
Dories are sharp-ended boats traditionally made of wood but now also produced in fibreglass or aluminium. They cut the water well, but their initial stability is low, making them feel tippy in flat water; a loaded dory becomes more stable as it is loaded. Dories are not generally used as service boats to yachts; they were used in large numbers in the cod fishing business, launched in numbers from the deck of a schooner hove to on the Grand Banks or other fishing ground. A dory can be landed or launched through surf where a Whitehall may founder.
Prams are similar to dories but are wider with transoms at both bow and stern. They are difficult to tip and carry a lot of cargo but are slow because of their lack of directional stability, although a keel and/or bilge runners can make a big difference, and even without they will row better than an inflatable.
Equipment that should be taken in a dinghy
life-jackets for every occupant
a bailing sponge
a large torch/flashlight
a mouth-blown horn (not a loud-hailer, but a breath-blown foghorn)