Modelling of sand waves in shelf seas

On the offshore sea bed, of e.g. the North Sea, extensive sand wave fields occur, see figure 1. Sand waves are wave-like seabed features, with elongated, more or less parallel crests. The wavelength is typically 500 meters, the height up to 10 meters, i.e. some 30% of the local water depth.

http://www.stw.nl/Projecten/T/tct/

Zipp-fastened flying suit, with helmet and goggles, by D. Lewis, Ltd. (Para. 273)- all types of...

www.flightglobal.com

Zipp-fastened flying suit, with helmet and goggles, by D. Lewis, Ltd. (Para. 273)- all types of aircraft components, including wings, tail planes, rudders, elevators, tanks, seats, cowlings; pressings; welding; anodic plating. J 7 THE SPERRY GYROSCOPE CO., LTD.

http://www.flightglobal.com/FlightPDFArchive/1938/1938%20-%203062.PDF

Painted Dial 19th Century Wood Cased Compass

The details that help us date this device are the blued steel needle with a cross on the north end, the knurled metal ring that secures the crystal, the latch, the painted dial and, most important of all, the manufacturer's mark, NEGELEIN, for N.G.

http://www.kitefarm.com/oregontrailmercantile/id417.htm

Useful Website and Document References - PPRuNe Forums

Registration is fast, simple and absolutely free so please, join the PPRuNe community today! If you have any problems with the registration process or your account login, please contact contact us.

http://www.pprune.org/forums/showthread.php?t=66205