Step 2. When the float component is sighted, 

 pull alongside with tlie spheres on the leeward 

 side so that the ship drifts down on the comix)- 

 nent. Hook the nylon net bug with a boathook, a 

 gatF, or an improvised recovery tool, and hold 

 the float component away from the side of the 

 ship until it can be lioisted aboard. Avoid, if 

 possible, having tlie glass spheres crash against 

 the ship as they may break, in which case the 

 core will sink. In addition, if tlie float compo- 

 nent receives too much rough handling or if the 

 core liner strikes the side of the ship, the taped 

 joints between the valve/ release mechanism 

 tube and/or the core cutter and the liner may 

 give away, which would cause the core to be lost. 

 NOTE : In some in.stances, it may be necessary 

 to put a diver in the water or a manned small 

 boat over the side to retrieve the float compo- 

 nent. Also, several additional loops of tether 

 line connected to the net may facilitate retrieval. 

 In addition a rope netting over the side at the 

 point where tlie float will be hoisted aboard may 

 eliminate damage to the float com|ionent. 



Step .'5. When the float component and liner 

 are aboard, keep the liner in a near upright 

 position, place the float spheres in the sphere 

 rack, replace the magnet switch on the flashing 

 spliere, and not« the time. 



L-46 Removing, Logging, and Labeling the 

 Boomerang Core. — To remove, log, and label 

 the Boomerang core proceed as follows: 



Step 1. Keeping the core liner in a near up- 

 right position, peel the tape from the Ix)ttom 

 of the liner and the core catcher. Then remove 

 the core catcher and cover the end of liner with 

 a plastic cap and tape it in place. 



Step 2. Put any sediment retained by the 

 core catcher in a sample jar. 



Step 3. Pe«l the tape off the joint between the 

 Inier and the valve/release mechanism tube and 

 remove it from the liner. Then, with a saw, make 

 a cut through the plastic liner just above the top 

 of the core sample. Let the water drain off 

 slowly, then flnish cutting off the liner. Finally, 

 cap the top of the liner with a plastic cap, and 

 tape it in place. 



Step 4. I^g the samples (core as one, jar as 

 one) on the Oceanographic Log Sheet-M ac- 

 cording to instructions given in paragraph 

 L-39, Oceanographic Log Sheet-M Bottom 

 Sediment Data. In addition under remarks, 

 record the total number of minutes the flashing 

 unit was in operation. 



Step 5. Label samples according to instruc- 

 tions given in paragraph L-40, Labeling the 

 Bottom Sediment Sample(s). 



St«p 6. If the liner used was CAB plastic, 

 coat it with wax according to instructions given 

 in paragraph L^30, Applying Wax to Core 

 Sample Liners. 



L-47 Maintenance of the Boomerang 

 Corer. — In general the Boomerang corer re- 

 quires very little maintenance since the ballast 

 component is never recovered. The float compo- 

 nent, however, usually is recovered and should 

 be kept and matched with another ballast com- 

 ponent. The following maintenance should be 

 performed on the items in the float component : 

 Nylon lines and net bag — Rinse with fresh 



water and dry before storing. 

 Spher&s and spacer— Einse with fresh 



water. 

 Core Catcher — Rinse with fresh water, dry, 



and oil lightly. 

 Valve/release mechanism tube — Rinse with 

 fresh water, dry, and oil lightly. 



Change 1—1970 



L-27 



