Harbor Plans 



Classical Harbors 



As maritime trade developed in the 

 ancient world, the history of ports 

 became the history of Mediterranean 

 civilization. Many ancient ports 

 were located strategically in relation 

 to trade routes, such as the 

 Phoenician cities where the Medi- 

 terranean touched the Fertile 

 Crescent, the Cretan cities located 

 on cross-routes, and the Greek and 

 Roman ports that controlled various 

 straits. Principal ports which where 

 free of silting - such as Massilia, 

 Carthage, and Alexandria - could be 

 developed; but in the Adriatic and 

 Asia Minor the rivers silted up the 

 harbors. Promontories and islands in 

 other ports provided shelter from 

 wind and waves, but many such 

 natural harbors still required help 

 from man. Stonework remains found 

 today show that port works 

 ranged from simple quays and moles 



CARTHAGE 



HAIICARNASSUS 



(such as those at Halicarnassus 

 and Syracuse) to the sophisticated 

 structure of the "cothon" harbor at 

 Carthage. With their invention of 

 hydraulic cement the Romans greatly 

 advanced harbor engineering. 



Rebikoff's Underwater Camera 



Rebikoff's Torpille is a flash unit 

 housed in a streamlined casing. It 

 can be used by free divers, (right) 

 The self-contained submarine 

 vehicle (below) is capable of 

 carrying one diver. It is possible 

 to photograph rapidly underwater 

 sequences in a short time and in a 

 constant position. 



Instrument panel in water-tight tiousing 



Magnetic compass 



Ctironometer 



Gyrocompass 



Deptti gauge 



Battery 



Body of vehicle 



1-1/2 HP electric motor 



Directional rudder control bar 



Turbo propeller 



Directional rudder 



Diving rudder 



Propeller shroud 



Control stick 



Motor control sticl< 



Differential aileron controlling pitch & roll 



Bumper 



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