Met Flashcards
When do we pass the instant wind?
When the pilot requests it.
What considerations are there regarding precipitation?
- Wet runways and braking action
- Snow and slush
- Poor visibility
- Weather clutter on ATM
- Associated gusting winds
What are LVO’s?
Low visibility Operations
Generic term for airside operations in conditions of reduced visibility or low cloud, consists of LVP’s and safeguarding
What is Safeguarding?
Preparation of rht aerodrome for LVP’s
What are LVP’s?
Low Visibility Procedures
- The actions carried out by ATC and operator in repsect to a/c and vehicle movements
- Includes restriction of access to the manoeuvring area and protection of ILS critical and sensitive areas
- Reduced movement rates
- Commencent varies between aerodromes
- Required for ops in lower than standard Cat I or II, or Cat II/III approaches and low vis take-offs
When is RVR reported?
When the met vis is less than 1500m
What are the two methods of RVR reporting?
Human observer method (only for the Touchdown zone)
Instrument RVR (up to three measurements along the runway length)
In what increments is RVR reported?
25m up to 400m
50m between 400-800m
100m above 800m
What is the minimum RVR reportable?
50m
What is the maximum RVR reportable?
2000m
When are IRVR values passed?
At the beginning of each approach to land, changes must be passed until a/c lands
And must be passed before take-off
How would you transmit the RVR?
“RVR runway 26, 650-500-550 metres”
If there are only 2 they have to be identified individually;
“RVR runway 26, touchdown 650, stop end 550 metres”
Can you provide RVR is two transmissometeres are U/S?
Yes provided the remaining one is not the stop-end otherwise it would be U/S (in this case you would just change runways making the stop-end the touchdown)
Can a controller pass information that suggests that the RVR is better than that reported?
No
Can a controller pass information suggesting that the RVR is worse than that being reported?
yes
