The SSMO series of coastal marine summaries is managed and produced by the Naval Oceanography Command Detachment, Asheville, N.C. for the Commander, Naval Oceanography Command. A list of published SSMO's is contained in the catalogue part of the 'Guide to Standard Weather Summaries and Climatic Services', NAVAIR 50-1C-534. The data summarized in the tables were obtained from Tape Data Family 11 (TDF-11) Marine Surface Observations. The development and maintenance of TDF-11 was primarily funded by the Naval Oceanography Command. The source of these marine surface observations was punched cards of weather observation taken aboard vessels of varying registry. These observations were recorded on magnetic tape in a common format. Elements not in WMO code were converted to this code where possible. Where this was not possible, the original data were retained within the tape record as supplemental data. A very limited quality control was attempted as the punched cards were converted to taped records and, where possible, missing psychrometric data were computed.