Codes used in descriptions of MC-78: William A. Watkins collection of marine mammal sound recordings CU: Cue or time (min:sec) on tape at signal end NC: Number of channels recorded SR: Sample rate CS: Cut size - seconds PL: Playback recorder/filter type, settings in kHz SC: Signal class, letter codes:Signature, Mimic, Variant, Deletion, Uncharacteristic, Calf, etc. ID: Identification of vocal animal, species code AG: Age, sex prefix (M or F), birth year of vocalizing animal IA: Interaction, male-male (MM)/female-calf (FC), etc., with ID's GS: Genus and species of vocalizing animal GA: Geographic location A, geographic area code from ASFIS (Aquatic Sciences and Fisheries Information System) map, species code NT: Note; species code, comments, recording details DA: Date of the record entry, last modification of database entry IP: ID of conspecifics present, species code AP: Age of conspecifics present - sex prefix with age and ID BH: Behavior codes, species code OS: Other species present, species code NA: Number of animals vocalizing, species code GB: Geographic location B GC: Geographic location C, latitude and longitude OT: Observation time for original, species code SH: Ship/cruise, aquarium or other platform AU: Author,originator of the recording HY: Hydrophone depth in meters RC: Conditions, weather, salinity RG: Recording gear RB: Recording bandwith, lowest and highest kHz SL: Signal level, Received, Source, species code ST: Signal type TD: Time duration TS: Time signal duration TC: Time duty cycle (area/peak) TA: Time amplitude variable (attack and decay) FR: Frequency reference center (aggregate) FB: Frequency bandwith (aggregate) FI: Frequency instantaneous average (binsize) FT: Frequency trends FS: Frequency skew SP: Signal pattern of occurrence, repetition