|Within Vocab||SeaVoX Device Catalogue|
|Preferred Label||Hamon grab|
|Definition||The Hamon grab is used for obtaining samples in coarse sediment, as well as for sampling benthic infauna. It has a typical sampling area of 0.25 m2 (0.2 m2 - 0.29 m2) and a penetration depth up to 30 cm. This grab consists of a rectangular (but sometimes triangular) frame forming a stable support for a sampling bucket attached to a pivoted arm. On reaching the seabed, tension in the wire is released which causes the sampling bucket to pivot through 90 degrees pushing seabed sediment into the bucket. The bucket locates onto an inclined rubber-covered steel plate, sealing it completely. Weights are attached to the grab to minimize the lateral movement of the supporting frame during sample collection.|
|Alternative Label||Hamon grab|
|Has Current Version||http://vocab.nerc.ac.uk/collection/L22/current/TOOL0960/1/|
|Authored On||2015-12-16 16:57:05|
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