IV. SUMMARY 
A lightweight pneumatic coring device intended for use from relatively 
small research vessels was designed and tested. Results of field tests showed 
that the corer, when powered by a 3-inch piston vibrator, was capable of 
recovering 1- to 2-meter-long cores in nominal 2-inch Schedule 40 PVC pipe 
from a variety of sediments with recovery in some cases of up to 2.4 meters 
which was the maximum length of core tube used. The lightweight corer was 
found to be relatively easy to deploy and recover in seas from 0.6 to 1 meter 
high, with the 14.5-meter support vessel secured by anchors fore and aft. 
Additional support equipment required included a boom with winch and a 25- 
cubic-feet—per-minute air compressor. 
