What does the number 381 indicate in grid square 4388?

1. Approximate height is 381
2. Relative height
3. Spot height showing the height of a particular point above sea level is 381 m
4. Spot height showing the height of that place is 381

What does △ 224 in grid square 2706 indicates?

1. The height of a particular point
2. Triangulated height - showing the height of a point surveyed by the triangulated method is 224m
3. Triangulation survey showing the height of a point of 224m
4. Approximate height of the point is 224 m

Name the three types of communication shown in the grid square 6621.

1. Metalled road, cart track, pack tract
2. Cart track, footpath, road
3. Footpath, pack track and metalled road
4. Cart track, road and footpath

Give four figure grid reference of the temporary huts

1. 4199
2. 4099
3. 9940
4. 0041