VISIBILITY TABLE BETWEEN DAWN AND SUNRISE

Hour                Time before Sunrise                Objects discerned

Hrs.   Mins.

1-30 a.m.                     2         15         Break of dawn.

2-20 a.m.                     1         25         Read watch.

2-30 a.m.                     1         15         See chalk trenches at 600 yards.

2-45 a.m.                     1          0         See earth trenches at 600 yards.

3-5 a.m.                       0         40         Distinguish trenches a mile off.

3-10 a.m.                     0         35         See aeroplane easily flying at 3000’

(Looks black cannot see colours.)

3.15 a.m.                     0         30         Distinguish men’s heads above trenches at 100 yards.

3-25 a.m.                     0         20        See foresight of rifle and men at 300 yards    sufficiently easy for accurate firing.

3-35 a.m.                     0         10         Perfect light to see any objects.

Sunrise at 3-45 a.m.

The morning was an average summer morning, clear sky with thin banks of clouds in the East.

29/5/16