Figure E-3. Winch operator (1), bottle passer (2), and bottle hanger (3). 



the messenger to the Nansen bottle, depress the 

 messenger release arm, and insert the messenger 

 wire loop in the hold slot on the undei-side of 

 the clamp assembly. After making sure the 

 messenger release pin has seated itself through 

 the loop, attach the messenger to the wire, check 

 that it is properly closed and slides freely, then 

 signal the winch operator to lower away. 

 NOTE : If the wire angle of the cast is 35° or 

 more and on all deep casts use two messengers 

 on each bottle to assure tripping. On all bottles 

 except the first bottle placed on th^ wire, mes- 

 senger{s) must be attached. To avoid the acci- 



dental tripping of bottles that have been 

 lowered, the safety line may be attached to the 

 oceanographic wire while the messenger (s) is 

 being attached. 



Step 4. Lowering the Nansen Bottle. — Lower 

 the Nansen Ijottle slowly until it has entered the 

 water. When the bottle is one or two meters be- 

 low the surface gradually increase the speed 

 of the winch to its normal lowering speed. If 

 the bottle is lowered into the water too rapidly, 

 the messenger may release prematurely or the 

 bottle may trip. In the first instance, any bot- 

 tles below will be tripped, and in the second, 



E-5 



