Gravity corers can be operated from a small boat in both shallow and deep waters. Piston corers normally need a raft to act as a platform. We also have corers with different diameter core tubes including the 'Big Ben' corer that enables extra large volume samples to be taken e.g. when macrofossil as well as microfossil remains are needed. We take sediment cores for clients not only to provide chemical and biological records but also to calculate rates of sediment infill and infill volumes.