Sea surface 



T. * 



1998 ft. 



Sea f/odr :'■ 



Deepesf part - of fhe 

 Norm Sea compared 

 with fhe heighh of fhe 

 Woolworfh Buildinq 

 New York (792 fh) 



Average deprh 

 of fhe Oceans 

 12,000 Pfc 



Sea Floor •:«•*.* 



PENETRATION OF 

 SUNLIGHT. 

 Aflanfic Ocean 



3I°20n:35-7w 

 12,750 feef deep. 

 June, Mid-day. 



-sea surface 



-650 ff. -Lower limif 

 of fhe bulk of planf 

 life m fhe Ocean. 



"3,2»off Photographic 

 plafe blackened affer 

 80nnnufes exposure. 



5,578 ff. Plafe nor aff- 

 ected after I20min. 

 exposure. 



Greatest deprh 



yef recorded 



32,IO0ff. 



(Pacific) 

 I 



."•••;•. ,: ■;;:•.".•.•. '..:■.•.'■'■'"•'.' •':.••'.•;• '.':;•'■';• ':■'••;'■: 

 Y:V^'A'::;.V-V.'*/. : J $ ea floor '■>'$.'/?"]''!• : &-'-'< 



*i 



Alhirude record 



for Aeroplanes 



(2J1 f AuguSf 1926) 



40,821 ff. 



**~mMl\AM 



PL 2. 



Depths of the Ocean (pp. 5, 227). 



B6. 



The limit of commercial trawling shown is the extreme limit; the deepest 

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



1 fathom = fj feet - 1'83 metres. 



