Nets with mesh of 4 mm. or 7 mm. (o-i6 in. or 0-28 in.) attached to back of trawl. 



DGA Depth gauge, Admiralty pattern. 



DGB Depth gauge, Budenberg pattern. 



DGT Depth gauge, reversing thermometer type. 



DL Large dredge. Light pattern, 4 ft. in length (1-2 m.). 



DLH Large dredge. Heavy pattern, 4 ft. in length (1-2 m.). 



H Horizontal. 



HH Hand harpoon. 



KT Kelvin tube. 



LH Hand lines. 



N4-T] 



N 50 50cm. tow-net. Mouth circular,50cm. in diameter(i9-5in.): 200 meshes to the linear inch. 



N 70* 70 cm. tow-net. Mouth circular, 70 cm. in diameter (27-5 in.): mesh graded, at cod-end 



74 to the linear inch. 

 N 100 I m. tow-net. Mouth circular, i m. in diameter (3-3 ft.): mesh graded, at cod-end 16 to 



the linear inch. From July i, 1927, this net was replaced by another, of similar pattern, 



but with the cod-end made of stramin with 11-12 meshes to the linear inch. 

 N 200 2 m. tow-net. Mouth circular, 2 m. in diameter (6-6 ft.): mesh graded, at cod-end 4 mm. 



(o-i6 in.). 

 N 450 4I m. tow-net. Mouth circular, 4I m. in diameter (14-8 ft.): mesh graded, at cod-end 



7 mm. (0-28 in.). 

 NC 50 Coarse 50 cm. tow-net. Mouth circular, 50 cm. in diameter (19-5 in.): 25 meshes to the 



linear inch. 



NCS-D"! 



ivTr'c XT I Tow-net of coarse silk, with 16 meshes to the linear inch, attached to dredge, trawl, or 



^^g_.j,J other net. 



NH Hand net. 



NHS High-speed tow-net. Mouth 3 in. in diameter (7-5 cm.): mesh 74 to the linear inch. 



NRL Large rectangular net. Frame 8 ft. long and 2-^ ft. wide (2'45 m. x 0-7 m.) with bag 



of -| in. mesh (12-5 mm.). 

 NRM Medium rectangular net. Frame 4 ft. long and i| ft. wide (1-22 m. x 0-38 m.), with 



bag of 7 mm. mesh (0-28 in.). 

 NRS Small rectangular net. Frame 3 ft. long and i ft. wide (0-9 m. x 0-3 m.), with bag of 



4 mm. mesh (o-i6 in.). 

 NS Seine net. Length 30 fathoms (55 m.): mesh at cod-end i| in. (3-8 cm.). 



OTC Commercial otter trawl. Head rope 80 ft. long (24-5 m.): mesh at cod-end li in. 



(3-8 cm.). 

 OTL Large otter trawl. Head rope 40 ft. long (12-2 m.): mesh at cod-end ij in. (3-2 cm.). 

 OTM Medium otter trawl. Head rope 30 ft. long (9-14 m.): mesh at cod-end i| in. (3-2 cm.). 

 KM Mussel rake. 



SL Sondeur Leger. 



STB Baillie Sounding Rod. 



STN Sounding rod, Nansen-Ekman type. 



TD Transparency (or Secchi) disc, 50 cm. in diameter (i9'5 in.). 



TGL Large gauze fish-trap. Cylindrical, 3 ft. long and i ft. in diameter (0-9 m. x 0-3 m.): 



gauze with 8 meshes to linear inch. 

 TGM Medium gauze fish-trap. Cylindrical, i| feet long and 6 in. in diameter (45 cm. x 15 cm.) : 



gauze with 16 meshes to linear inch. 

 TGS Small gauze fish-trap. Cylindrical, 9 in. long and 3 in. in diameter (23 cm. x 7-5 cm.): 



gauze with 34 meshes to linear inch. 



* In some early labels this net is incorrectly referred to as "N75." 



4 



\ 

 I 



