Q. R. Dokken, R. C. Circe, C. W. Holmes; A portable, self supporting, hydraulic vibracorer for coring submerged, unconsolidated sediments. Journal of Sedimentary Research ; 49 (2): 658–659. doi: https://doi.org/10.1306/212F77F7-2B24-11D7-8648000102C1865D
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A portable, hydraulic vibracorer which takes a core 5.4 m long and 7.5 cm in diameter is described. It was used in waters up to 33.6 m deep to core unconsolidated sediments and was operated by as few as four people from vessels as small as 10.5 m in length. The unit cost approximately $6,000 (U.S., 1977) to build and was easily transported by truck and ship. A standard hydraulic jackhammer is the driving mechanism and is supported in the coring position by a guidetrack with tripod support. SCUBA divers are required for assembly and disassembly, and total coring time, including assembly and disassembly, averages about 55 minutes.