VISIBILITY TABLE BETWEEN DAWN AND SUNRISE
Hour Time before Sunrise objects discerned
Hrs. Mins.
2.5 1 44 Break of dawn.
2.35 1 14 Read watch.
2.45 1 4 See chalk trenches at 600 yards.
2.50 – 59 See earth trenches at 600 yards.
3.20 – 29 Distinguish trenches a mile off.
No aeroplane up. See aeroplane easily flying at 3000’
(Looks black cannot see colours.)
3.15 – 34 Distinguish men’s heads above trenches at 100 yards.
3.25 – 24 See foresight of rifle and men at 300 yards sufficiently easy for accurate firing.
3.40 – 9 Perfect light to see any objects.
The morning was an average summer morning.
Sky with thin covering of clouds.
June 3rd 1916
