Boisseau, O. 2019. Sightings from R/V Song of the Whale during the spring 2019 MAPS survey (NMFS permit 14809). Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/2001) on yyyy-mm-dd.
The dataset contains all sightings of cetaceans and other megafuana made during the MAPS spring cruise in Apr/May 2019 (NMFS permit 14809). When conductiong visual effort, two observers were situated either side of R/V Song of the Whale on an observation platform with an approximate eye-height of 5.5 m above sea-level during daylight hours. The observers scanned the trackline and in front of the vessel using naked eye; 7 x 50 binoculars were used to identify species and estimate group size. During periods of bad weather, observers were stationed on deck with an approximate eye-height of 3.5 m above sea-level.
The MAPS (Marine Mammal Passive Acoustics and Spatial Ecology) cruises form part of a BOEM project to describe the distribution and behaviour of deep-diving cetaceans in the offshore waters of North Carolina (NMFS permit 14809). MAPS is a cooperative agreement between the Bureau of Ocean Energy Management and the University of North Carolina Wilmington in partnership with Duke University.
Environmental attributes were recorded less frequently than the GPS data and not all GPS records get environmental attributes attached.
This section explains attributes included in the original dataset.
OBIS-SEAMAP restricts the attributes available to the public to date/time, lat/lon and species names/counts only.
Should you need other attributes described here, you are encouraged to contact the data provider.
Attributes described below represent those in the original dataset provided by the provider.
Only minimum required attributes are visible and downloadable online. Other attributes may be obtained upon provider's permission.
Attributes in dataset
Attribute (table column)
Unique ID number (generated by OBIS-SEAMAP)
Chronological order of sightings
GPS time of sighting (UTC)
Sighting number during the survey
Date and time of sighting (UTC)
Platform (A-frame or deck)
Reference number for sighting
Magnetic bearing to sighting
Relative bearing to sighting
Angle source (magnetic or relative)
Radial (relative) bearing to sighting
Estimated distance to the animals sighted
Binocular reticles to sighting (if used)
Species code by provider
Species code of second species in a mixed group
Confidence of species ID
Initial cue for the sighting
Minimum number of animals
Maximum number of animals
Number of adults in group (if identifiable)
Number of juveniles in group (if identifiable)
Number of calves in group (if identifiable)
Birds associated with sighting (Y/N)
Seen by (observer initials)
Effort status for sighting (dedicated or incidental)
Aspect of animal(s) when first seen (relative to vessel)
Heading of animal(s) when first seen (relative to vessel)
Behaviour code 1 (if any)
Behaviour code 2 (if any)
Behaviour code 3 (if any)
Latitude in decimal degrees
Longitude in decimal degrees
Heading of vessel (true degrees)
Error code for heading
Speed over ground of vessel (knots)
Engine revs (rpm)
Wind speed (knots)
Wind direction (degrees)
Wind measurement (true or relative)
Sea surface temperature
Wave height (m)
Cloud cover (out of 10)
Visibility (1=poor, 3=good)
Glare intensity (0=none, 2=severe)
Start angle of any glare (degrees relative to vessel)
Stop angle of any glare (degrees relative to vessel)
Start angle of any sails (degrees relative to vessel)
Stop angle of any sails (degrees relative to vessel)