V EF
V MO
V2
V1-Maximum speed during takeoff that the pilot mat abort the takeoff and stop the airplane within the accelerate -stop distance.
-Minimum airspeed in the takeoff following a failure of the critical engine at V EF at which the pilot can continue the takeoff and achieve the required height above the takeoff surface within the takeoff distance.
속도의 종류는 봐도봐도 헷갈린다...왜그러는 것이냐... 끙...
전에 고운이가 발표한걸 참고해서 다시 봐야겠다.
ILS CATEGORY
Category 1
200ft decision height
Category 2
1600ft RVR and a 150ft decision height
Category 3
100ft decision height
| Approach category | Decision height or alert height (minimum above runway threshold or touchdown zone) | Runway visual range (RVR) | Visibility minimum | Notes |
|---|---|---|---|---|
| I | 200 ft (61 m)[8] | 550 m or 1,800 ft[8] (1,200 ft is approved at some airports[9]), increased to 800 m for single crew operations | 800 m (1,600 ft or 1,200 ft in Canada)[10] | Either visibility not less than 800 m or 2,400 ft or a runway visual range (RVR) not less than 550 meters (1,800 ft) on runway with touchdown zone and centerline lighting. FAA Order 8400.13D allows for special authorization of CAT I ILS approaches to a decision height of 150 feet (46 m) with RVR ≥ 1,400 feet (430 m).[11] The aircraft and crew must be approved for CAT II operations and a heads-up display in CAT II or III mode must be used to the decision height. CAT II/III missed approach criteria apply.[11] |
| II | 100 ft (30 m)[8] | 1,200 feet (370 m)[8] | N/A | ICAO and FAA: 350 meters (1,150 ft) or JAA: 300 meters (980 ft).[7] |
| IIIa | No DH[8] | 700 feet (210 m)[8] | N/A | |
| IIIb | No DH[8] | 150 feet (46 m)[8] | N/A | |
| IIIc | No DH[8] | No RVR[8] | N/A | As of 2012 this category is not yet in operation anywhere in the world as it requires guidance to taxi in zero visibility as well. Category IIIc is not mentioned in EU-OPS. |
---from wikipedia