21. A second and simpler technique is to bomb from a shallow dive angle, sometimes referred to as " glide bombing ". 22. Conducting a shallow dive the light frame of the Do 17 could reach 500 km / h ( 310 mph ). 23. The male performs " winnowing " display during courtship, flying high in circles and then taking shallow dives to produce a distinctive sound. 24. It lay motionless on the surface facing the ship and then began to swim towards the vessel, picking up speed by shallow diving . 25. Fur seals, for example, normally do quick, shallow dives at night when fish schools are close to the surface, Dr . Majluk said. 26. However, speeds in excess of Mach 1 were attained in a shallow dive with this aircraft, making it the only supersonic seaplane to date. 27. Another 168 derivative was the La-176, the first Soviet plane to achieve supersonic flight ( in a shallow dive ) on December 26, 1948. 28. The male performs a " winnowing " display during courtship, flying high in circles and then taking shallow dives to produce a distinctive sound. 29. Toucan Divers of the resort arrange a special diving near the Town Pier, which is a shallow dive site with colourful and varied marine life. 30. On 1 December 2005, the A380 achieved its maximum design speed of Mach 0.96, ( its design cruise speed is Mach 0.85 ) in a shallow dive .