On SIGWX (significant weather) charts, what does **/** mean?

Peter
Related questions and answers
  • On SIGWX charts, it shows pairs of symbols with, say, */** or **/**. I know what the symbols mean on either side, but why are there two, and what does the slash indicate? Would love good resources that explain more, too. Example chart here, from the FAA sample questions (caution: 37 MB download), Figure 20, over Southern California. I’m also interested in knowing what a dot with R underneath means.

  • Let's say that we're directly west of CATLI and have been cleared direct CATLI for the RNAV approach. We load the approach into the GNS430 and proceed direct the fix. After crossing CATLI outbound for the hold-in-lieu-of-procedure-turn, we realize that we want to stay in the hold for a few more turns. How do I tell the 430 that I don't want it to sequence to ZAMGI upon arrival at CATLI?

  • , and does this show up in the FMS exactly the same as a mandatory crossing altitude? Are expected altitudes treated as suggestions by pilots or controllers? For example, in the above chart, if you...STAR charts often have expected altitudes. For example: This is, of course, different from mandatory crossing altitudes, and it seems a STAR with only expected altitudes would be insufficient for ATC to issue a descend via clearance, though I could be wrong about the second part. Some charts say "VERTICAL NAVIGATION PLANNING INFORMATION" before the expected altitude, so my assumption

  • In the Slashdot article Is the Tesla Model S Pedal Placement A Safety Hazard? it says: what aviation analysts call a 'design-induced pilot error' I tried to search for design-induced pilot error on Google, but found things too complex to understand! What does this mean?

  • I noticed on SkyVector that, for example, the Resolute Bay VOR (YRB) and Baker Lake VOR (YBK) seem to be oriented in such a way that the 360 radial is pointing in the direction of true north (and I don't think the variation is anywhere near zero there). I know VORs are supposed to be oriented according to magnetic north, but is it common practice close to the magnetic poles to have them point true instead? If so, is there any way to tell if a particular VOR is doing just that, except looking at the chart and noticing that the small arrow is pointing north rather than off to one side?

  • In a flight database that I'm working with on a project, there is a column of data called "flightCategory" with values "C", "G", "T", etc. Any idea what those actually mean? From what I understand, the database is from FAA. But I'm not 100% sure.

  • I'm from Brazil, and here we use the West/East rule, so we use an odd flight level when we fly between 0/360 - 179, and when we fly between 180 - 359 we fly in an even flight level. But what should you do in other countries? Where I can find those rules? I've heard that in Europe it's totally different, and that in some countries in Asia they use meters, instead of feet. Where can I find this information?

  • While asking the question in chat How do we get controllers on the site? @egid suggested there may be FAA or union restrictions on participating in Q&A. That would be sad since pilots and controllers communicating with each other improves safety and efficiency... but certainly doesn't mean it isn't true. Does anyone know of specific restrictions placed on controllers by the FAA or NATCA (National Air Traffic Controllers Association) which would prevent them from answering questions on this site? I realize this blurs the line slightly between the main site and meta, but I'm asking about

  • I've flown a Piper that has a button labeled CWS on the yoke, right next to the "Push-To-Talk" button. I never got a chance to push it though. What does it do?

  • FAR Part 91, Appendix G, Section 2 says: (c) Altitude-keeping equipment: All aircraft. To approve an aircraft group or a nongroup aircraft, the Administrator must find that the aircraft meets the following requirements: ... (2) The aircraft must be equipped with at least one automatic altitude control system that controls the aircraft altitude Note that it does not say that it must be engaged, or even operative. Simply "equipped", and also that this is to approve an aircraft for RVSM. From what I can find, there is no operational requirement for the autopilot

Data information