VISIBILITY TABLE BETWEEN DAWN AND SUNRISE

HOUR                        TIME BEFORE SUNRISE               OBJECTS DISCERNED

Hrs.   Mins.

2.20                             1         30         Break of dawn.

2.40                             1         10         Read watch.

2.55                             –         55         See chalk trenches at 600 yards.

3.5                               –          45         See earth trenches at 600 yards.

3.25                             –         25         Distinguish trenches a mile off.

No aeroplane up.         See aeroplane easily flying at 3000’

(Looks black cannot see colours.)

3.20                          –         30        Distinguish men’s heads above trenches at 100 yards.

3-30                              –         20        See foresight of rifle and men at 300 yards    sufficiently easy for accurate firing.

The morning was too dull to give perfect light to see any objects

a time for this.

The morning was a grey summer morning.

Cloudy sky.

2^nd June 1916