MARSSAM is the OSU coring and dredging facility providing marine geologic sampling services for US National Science Foundation (NSF) investigators using the UNOLS Academic Research Fleet (ARF) and the USCG ice breaker R/V Healy, as well as international vessels supporting NSF research. Funding for these services is provided by the Ship Facilities Program at NSF. The OSU coring gear is among the best available in the United States, including large-volume and small-volume piston corers, box corers, kasten corers, and several multicorers and slow corers for undisturbed recovery of the sediment-water interface. Seagoing technicians from the facility have operated coring and dredging gear on most ARF vessels. We can also be engaged on a contract basis for non-NSF researchers and private entities requiring seafloor sampling support.