What is an alternate minima?

What is an alternate minima?

For flight by aeroplanes under VFR (day or night) and helicopters operating under VFR at night, the alternate minima are a ceiling of 1500 ft and a visibility of 8 km (AIP ENR 1.1). cloud – more than SCT below a ceiling of 1000 ft, or. visibility – less than 3000 m.

What is the requirement for the validity of a forecast for arrival at an aerodrome?

The validity period of the weather forecasts must cover the period of the flight. Furthermore, the aerodrome forecasts for the destination and alternate aerodromes—to be nominated in the flight plan—must be valid for a period of not less than 30 minutes before and 60 minutes after the planned ETA.

What is the 123 rule?

The Mariner’s 1-2-3 rule, also referred to as the Danger Rule, is an important guideline mariners follow to keep out of a tropical storm or hurricane’s path. It refers to the rounded long-term National Hurricane Center (NHC) forecast errors of 100-200-300 nautical miles at 24-48-72 hours, respectively.

What is the validity of a TAF?

30 hour
A TAF is the international standard code format for terminal forecasts issued for airports. TAFs are valid for a 30 hour time period and are issued 4 times a day at 6 hour intervals. The forecast includes forecasted wind speed, wind direction, visibility, ceiling, type of precipitation (i.e. snow, rain, etc.)

When do flight forecasts have to be valid?

Furthermore, the aerodrome forecasts for the destination and alternate aerodromes—to be nominated in the flight plan—must be valid for a period of not less than 30 minutes before and 60 minutes after the planned ETA.

What do you need to know about flight planning?

Planning: make decisions and calculations about your route: the weather; how much fuel to carry; your load; and any potential diversions, delays or emergencies. Pre-flight: inspect the aircraft: analyse any faults or conditions and if these will affect the flight plan.

When do you not need to make an alternate flight due to weather?

When weather conditions at the destination are forecast to be above the values specified above, but additionally, intermittent or temporary deteriorations in the weather below those values are forecast, provision of an alternate need not be made if sufficient additional fuel is carried to allow the aircraft to hold for:

When to select an aerodrome for a flight?

An operator shall only select an aerodrome for one of those purposes when the appropriate weather reports or forecasts, or any combination thereof, indicate that, during a period commencing one hour before and ending one hour after the estimated time of arrival at the aerodrome, the weather conditions will be at or above the planning minima.