BATHYGRAPHI CAL COLOURING 
SCALE 
COLOURS 
ABOVE 
3750 
3750 
TO 
3500 
3500 
TO 
3250 
3250 
TO 
3000 
3000 
TO 
2750 
2750 
TO \ 
2500 
2500 
TO 
2250 
2250 
TO : 
2000 
2000 
TO 
1760 
1750 
- TO 
1500 
1500 
TO 
(250 
1250 
TO 
1000 
1000 
TO 
750 
750 
TO 
500 
500 
TO 
250 
250 
TO 
SEA 
I 
