The lesser of the height above ground or water of the base of the lowest layer of cloud covering more than half the sky or the vertical visibility in a surface-based layer which completely obscures the whole sky.

Land and Hold Short Operations

unreliable; it transmits

NOTAM

50

"G"

Advise ATS, and, if necessary, revert to using traditional aids for navigation.

No

20 miles north of Toronto; 20 DME north of Toronto.

readable with difficulty

122.75

follow normal communications failure procedures; 7600

NAV CANADA flight information centres (FIC)

PIREPs

To notify pilots of potentially hazardous weather conditions not described in the current graphic area forecast (GFA).

200 ft overcast

After 1300Z.

Greater than 6 SM.

When there are lower sector visibilities, which are half or less of the prevailing visibility.

en-route; is not

is not; the target will be lost on the ATC radar screen

the current altimeter setting of that aerodrome; if the altimeter setting is not available, to the elevation of that aerodrome; standard pressure (29.92 inches of mercury or 1013.2 mbs)

45; normal cruising speed; 20; normal cruising speed

200

FISE; SAR action

1-888-226-7277; 2; 48

5; UTC; 5

30

7700

A replacing or a cancelling NOTAM must be issued.

NAV CANADA; Transport Canada

a maintenance schedule, approved by the Minister

Bonding prevents sparks by equalizing or draining the electric potentials.

3 000 ft

refraction error

at or above; beyond

Identify themselves as the holder of a pilot’s licence.

night vision; reaction time

48 hr