Deepesh parh of the 

 Norm Sea compared 

 wil-hrheheiqhhofl-he 

 Woolworfh Buildinq 

 NewyorK(,792f^) 



Average dephh 



of ftie Oceans 



12,000 fh 



:;':■•■':}< Sea Floor': 



PENETRATION OF 

 SUNLIGHT. 

 AHanfic Ocean 

 3r20N:3b-'7w 

 12,750 feef deep, 

 June. Mid-day. 



«— 3ea surface 



*-650fl-.- Lower limif 

 oFfhebulkofplanf 

 life in fhe Ocean. 



* 3,280 ff. PhofographiC 

 plafe biackenetf dffer 

 80 m I nufes exposure. 



5,578 fh Plafe nof aff- 

 ecfedaffer I20min, 

 exposure. 



''■■■■•■:••.': Sea f/oor '•'.'•'■•'•: ■'. 



Limif of Commercial Trawling 



■"-<' M^Everesh 



29,000 f h 



Greafesf depfh 



yef recorded 



32,IOOff. 



(Pacific) 



••■.•■.■.•;//; Sea floo 



'< 



Aififude record 



for Aeroplanes 



(25':^AugusH92S) 



40,821 fh 



J^^M^^Ml^A 



PL 2. B6. 



Depths of the Ocean (pp. 5, 2-27). 

 The limit of commercial trawling shown is the e.vtreme limit ; the deepest 

 trawling for hake is only economical down to a depth of about 2000 feet. 



leet - 1*83 metres. 



