Part 2: Basic Navigation Flashcards
What is magnetic variation?
The difference between true north and magnetic north.
Which north is this?
True north (can also be a diamond)
Which north is this?
Magnetic North
What symbol is used for grid north?
Arrow, letters GN or square
Which star can you find using the Plough/Great bear?
The North Star/Pole Star
What is magnetic deviation?
Disturbance caused to a compass by metal objects nearby
How do you convert from Grid to Magnetic bearings?
Grid to Mag = ADD
How do you convert from Magnetic bearings to Grid bearings?
Mag to Grid = RID
What is Naismith’s Rule?
4km/h walking time, plus 30 mins for every 200m climbed
What is Handrailing?
Following linear features (e.g. edge of wood, river, power line, etc)
What is aiming off?
Deliberately aiming to one side of your target (e.g. to find a bridge)
What is Contouring?
Going around a hill (i.e. staying at same height or contour line)
What is an Attack Point?
An easily identifiable feature near to your objective to aim for
Which Air Mass is A?
Polar Maritime
Which Air Mass is C?
Tropical Maritime
Which Air Mass is F?
Arctic Maritime
What is a front?
Where a cold air mass meets a warm air mass
What is this?
Cold Front
What is this?
A warm Front
What are Isobars?
lines of equal pressure
if isobars are close together, what does this mean?
Strong winds
If Isobars are spread out, what does this mean?
Light winds
What weather is associated with a Low Pressure system?
Poor weather - windy, wet, stormy
What weather is associated with a high pressure system?
Long periods of fine clear weather
What type of clouds are the fluffy, cotton-wool type clouds?
Cumulus
