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If the apparent source is a vessel, record as much information as possible.  Note the vessel name, hull number, type, color, location of superstructure, deck arrangement, colors on funnels, and get a digital image if possible, etc.  Such information could be useful in the event that the vessel has departed prior to the arrival of Coast Guard personnel.
 
E.3.b.2.  Time
 Record the time of each sighting.
 
E.3.b.3.  Location
 Record the latitude, longitude, and body of water.
 
E.3.b.4.  Weather Conditions
 Record the following weather conditions:
. Ceiling

. Visibility

. Wind direction and velocity

. Seaside conditions, height, and direction of movement

 
E.3.b.5.  Extent
 Record the following extent of the spill:
. Size

. Direction of movement

. Direction, width, and length from the source

 

 
E.3.b.6.  Density
 Describe the density of the oil sheen.  The terms defined in Table 10-1 below are used to describe the sightings.  A combination of these terms is normally used since the center of a spill will tend to be thicker than the edges.  These terms may be modified with light, medium, or heavy, and are ranked in order of increasing spill thickness.
 
E.3.c.  Photographic Evidence
 Whenever possible, it is desirable to gather photographic evidence to supplement written reports.  Ideally, these should be oblique color photographs taken with a 35mm camera, high-quality digital or video camera, preferably one with a date/time stamp inserted on the images.  Consult with your local MSO/MSD or coordinating unit for guidance on “chain of custody” procedures to be used for exposed film or videotape.
 
E.4.  Additional Training/ References
 “Open Water Oil Identification Job Aid for Aerial Observation” is an excellent job aid, which includes descriptions, as well as aerial photos.  This reference is published by NOAA/HAZMAT and the U.S. Coast Guard MS Office Puget Sound, Port Operations Department, and can be obtained online at:
http://response.restoration.noaa.gov/job_aid/jobaid.html
 

 
Table 10-1 Descriptions of Oil Sightings
 
Term
 Description
 
Light Sheens
 Light sheens are light, almost transparent layers of oil, which cause a glassy sheen on the surface of the water.  No “rainbow” hues are visible.  Some natural biological processes can also cause a sheen.
 
Silver Sheens
 Silver sheens are slightly thicker layers of oil that impart a silvery or shimmery look to the sheen.
 
Rainbow Sheens
 Rainbow sheens are rainbow-like reflections in the sheen.
　
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