Table 1.  Mean and standard deviation of distance between parallel passes with, and without navigation aids.

 

Distance Between Adjacent Passes (m)

Navigation

Mean

S.D.

Minimum

Maximum

No Aids

17.8

2.39

12.8

28.6

Foam Marking System

16.4

2.37

10.1

26.8

Lightbar

18.5

2.10

12.9

24.2

Target

16.1