IFR Magazine

A DME arc is a curved track at a constant distance around a facility that offers omnidirectional course information and DME, such as a VORTAC, VOR/DME or NDB/DME. This eliminates ILS or LOC DMEs. An arcs radius is 7- 30 NM and is 5-15 NM long, with 10 NM preferred. Thus, arcs can be lengthy and inefficient. The primary area required obstacle clearance is 1000 feet within four NM of the arc along the initial segment, with a 500-foot secondary clearance extending another two NM. In the intermediate segment, the clearance drops to 500 feet.

This is your third trip to Columbia, Missouri (KCOU), where youre flying in from the northwest in your trusty but basic Cessna 182. Equipment includes dual nav receivers, one glideslope receiver and DME. (For those of you watching at home, this is pre-RNAV Distance Measuring Equipment.) A portable GPS offers limited capabilities to navigate outside of your raw-data setup. No big deal; youve been flying this plane and panel for years and are a pro with ILS approaches. The filed route, which will be reversed to get home, departs from Watertown, South Dakota (KATY) and is: POEMS OTG V175 HLV.

An upper air sounding from the Slidell, Louisiana, NWS site, located about 85 SM west of the accident site, depicted a moist low-level environment with saturated conditions from 500 feet AGL to 6000 feet with a capping inversion. The freezing level was identified at 14,700 feet. The wind profile indicated calm surface wind with wind from the south-southeast veering to the southwest and west through 18,000 feet. A low-level wind maximum or low-level jet was identified near 5000 feet at 215 degrees at 25 knots, with winds less than 10 knots below 1000 feet AGL.

I had this exchange on a flight back to a rural Arkansas airport from Florida. I usually fly IFR even in VFR conditions. I was at 6000 feet, with a broken layer below me. I usually cancel about 20 miles in advance, as Memphis Center cannot see me on radar, or communicate with me once I descend below 3000 feet.

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An approach to safety of dont have an accident and always effectively weight risks doesnt work because we dont take actions we think will cause accidents. Tom Turner recently presented a Wings seminar, Stop Teaching About Safety, covering this. Safetys an integral outcome, not a separate goal. Instead, he suggested approaching flying as its master and commander: The result will be safety. While being master and commander will work for all pilots, the instrument environment presents unique challenges to achieving that goal.

An approach to safety of dont have an accident and always effectively weight risks doesnt work because we dont take actions we think will cause accidents. Tom Turner recently presented a Wings seminar, Stop Teaching About Safety, covering this. Safetys an integral outcome, not a separate goal. Instead, he suggested approaching flying as its master and commander: The result will be safety. While being master and commander will work for all pilots, the instrument environment presents unique challenges to achieving that goal.

Richfield was forecast to be overcast 2000 or better all day, so you didnt file an alternate and didnt carry alternate fuel. So thats the situation: 12,700 MSL at EBOVE, no GPS, no DME. Even turn off GPS location on your iPad if you have that. (In ForeFlight, this is in settings, scroll to the bottom, and set Enable Ownship to Never.) Give yourself 45 minutes of fuel at normal cruise. No one said you were good at planning.

When average Americans wake up and go to work every day, they expect to see mostly the same faces, same routine, the same stuff-like the expression same stuff, different day suggests. When pilots and air traffic controllers go to work, its often the same coworkers in the room or cockpit, but we both work with people on a daily basis that we have most likely never met. In fact, the chance that a center controller has met a pilot that they talk to on the radio is miniscule. Tower and TRACON controllers might have a somewhat higher chance.