Table 2. Details of coverage by images at the three altitudes flown during trial flights.

Altitude (ft)	Field of view (m) a		Area of overlap
	Length	Width	Along transect	Between transects
500	48	72	10%	0 (edge to edge)
750	72	108	10%	25%
1000	96	144	10%	50%

^a This is the area of the sea surface visible within each image, where length is along the transect, and width is perpendicular to the transect. Width is equivalent to transect strip width.