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I am wondering what these markings (which I found both in the French Super Etendard and in the British Tornado) indicate? They may be something relevant for the maintenance crews.

Vertical stabiliser of a Super Etendard modernise, showing two types of stencils, one looks like a hook, the other a horizontal line with two bulges

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    $\begingroup$ The top one indicates that it is safe to hang your uniform jacket from the winglet. :) $\endgroup$
    – FreeMan
    Oct 19 at 11:42
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The sine wave sign indicates an access panel for electronics. Two examples:

enter image description here
sbap.be; electronic comp. access

enter image description here
sbap.be; electrical bay access

The handle shape indicates a nearby anchor point for hoisting the plane.


Here's a collection:

enter image description here
scottbouch.com

In your photo, the forward facing protruding part is a forward radar warning antenna.

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    $\begingroup$ Your answer could be improved by listing the picketing point (upper symbol) and describing what it is. $\endgroup$ Oct 18 at 22:49
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    $\begingroup$ According to the diagram in the answer, the hook on a bar isn't a picketing point but a slinging/hoisting point. I don't know enough about maintenance to know if they're colloquially interchangeable. In any case, they're on civil aircraft too, not just military. $\endgroup$
    – nexus_2006
    Oct 18 at 23:56
  • $\begingroup$ @user: upper symbol was already described – see previous comment. Anyway, picketing point is simply tie-down point. $\endgroup$
    – ymb1
    Oct 19 at 1:24
  • $\begingroup$ Thanks for the answer, and for the helpful images. $\endgroup$ Oct 19 at 8:51
  • $\begingroup$ Two semicircles don't look like a sine wave to me... :[] $\endgroup$
    – Zeus
    Oct 19 at 23:46

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