BASIC UNITS OF LENGTH
Metric units
10 millimetres (mm) =1 centimetre
10 centimetre (cm) = 1 decimetre
10 decimetre (dm) = 1 metre
1000 metres (m) = 1 kilometres (km)
1852 metres = 1 nautical mile
British units
12 inches = 1 foot
3 feet = 1 yard
5½ yard = 1 rod or pole
4 pole (66 ft.) = 1 chain
10 chain = 1 furlong
8 furlong = 1 mile
100 links = 1 chain
6 ft. = 1 fathom
120 fathom = 1 cable length
6080 feet = 1 nautical mile
1 engineer’s chain = 100 ft.
BASIC UNITS OF AREA
Metric system
100 square millimetres (mm2) = 1square centimetre
100 square centres (cm2) = 1 square decimetre
100 square decimetres (dm2) = 1 square metre
100 square (m )
2
= 1 are
100 are (a) = 1 hectare
100 hectare (ha) = 1 square kilometre
British system
144 square inches = 1 square foot
9 square feet = 1 square yard
30¼ square yards = 1 square rod
40 square rods = 1 roods
4 roods = 1 acre
640 acre = 1 square mile
484 square yards = 1 square chain
10 square chain = 1 acre
Code of signals used in directing the assistant into the line
Rapid sweeps with right hand --------Move considerably to the right.
Rapid sweeps with left hand --------- Move conciderably to the left
Slow sweeps with right hand -------- Move slowly to the right
Slow sweeps with left hand ---------- Move slowly to the left
Right arm extended ------------------ Continue to move to the right
Left arm extended --------------------- Continue to move to the left
Right arm up and moved to the right ---------Plumb the rod to the right.
Left arm up and moved to the left ----------- Plumb the rod to the left.
Both hands above head and then brought down------ Correct.
Both arms extended forward horizontally and the hands depressed briskly ------- Fix.
Metric units
10 millimetres (mm) =1 centimetre
10 centimetre (cm) = 1 decimetre
10 decimetre (dm) = 1 metre
1000 metres (m) = 1 kilometres (km)
1852 metres = 1 nautical mile
British units
12 inches = 1 foot
3 feet = 1 yard
5½ yard = 1 rod or pole
4 pole (66 ft.) = 1 chain
10 chain = 1 furlong
8 furlong = 1 mile
100 links = 1 chain
6 ft. = 1 fathom
120 fathom = 1 cable length
6080 feet = 1 nautical mile
1 engineer’s chain = 100 ft.
BASIC UNITS OF AREA
Metric system
100 square millimetres (mm2) = 1square centimetre
100 square centres (cm2) = 1 square decimetre
100 square decimetres (dm2) = 1 square metre
100 square (m )
2
= 1 are
100 are (a) = 1 hectare
100 hectare (ha) = 1 square kilometre
British system
144 square inches = 1 square foot
9 square feet = 1 square yard
30¼ square yards = 1 square rod
40 square rods = 1 roods
4 roods = 1 acre
640 acre = 1 square mile
484 square yards = 1 square chain
10 square chain = 1 acre
Code of signals used in directing the assistant into the line
Rapid sweeps with right hand --------Move considerably to the right.
Rapid sweeps with left hand --------- Move conciderably to the left
Slow sweeps with right hand -------- Move slowly to the right
Slow sweeps with left hand ---------- Move slowly to the left
Right arm extended ------------------ Continue to move to the right
Left arm extended --------------------- Continue to move to the left
Right arm up and moved to the right ---------Plumb the rod to the right.
Left arm up and moved to the left ----------- Plumb the rod to the left.
Both hands above head and then brought down------ Correct.
Both arms extended forward horizontally and the hands depressed briskly ------- Fix.
