Understanding the fundamentals of altitudes and altitude reporting systems (altimeters) is important for flight planning, performance calculations, regulatory compliance, and in-flight problem solving. This subject is covered early in training for the Private Pilot Certificate, but I found it often needs review even up to the Certified Flight Instructor Certificate training level, thanks primarily to disuse.
You are about to go on a helicopter training flight at a local airport. There’s an Airmen’s Meteorological Information (AIRMET) Zulu posted for icing inclusive of your area of flight. Your helicopter has the following limitation written in the Rotorcraft Flight Manual (RFM): “Flight into known icing conditions prohibited.” Can you fly?
When planning a flight in marginal visual flight conditions, one thing we helicopter pilots realize is that the only weather reports we get in a briefing are Aviation Routine Weather Reports (METARs) and Terminal Area Forecasts (TAFs) from airports, or Area Forecasts (FA) and Weather Synopses covering larger areas. We then have to visualize the ceilings and visibilities between those ground reporting stations. If we are going to or launching from an off-airport site, that complicates our decision-making. While Weather Depiction graphics can help, another great tool in our flight planning toolbox is the Helicopter Emergency Medical Services (HEMS) Tool from the National Weather Service.
You recently received your Commercial Pilot Certificate for Rotorcraft-Helicopter and have arrived via taxicab at Thief River Falls Regional Airport (KTVF). It’s 1300Z and you’re going to pickup and ferry a helicopter to another airport about 300nm away. Looking at the Sectional Chart, you see that the airport is not towered.
If you’ve ever flown in Alaska or at least examined a sectional chart from the area, you’ve probably noticed the “WX CAM” notation at many airports. The Federal Aviation Administration (FAA) hosts a web site called FAA Aviation Weather Cameras, providing easy point-and-click access to the many public and third-party live cameras at airports throughout Alaska and Canada.