Pass Marking

[Green 123]

What does NASA mean by "pass marking" in following presentation:

 

[nuevavion]

I believe it should read: Fly a level pass, marking the MSL altimeter...

 

[rb1957]

that's how I read it to ... fly a level pass, noting the MSL altimeter reading that corresponds with 350' AGL ( ie what is the height above sealevel of the ground)

 

[IRstuff]

Makes sense, but one should always do a sanity check; the OP's interpretation would have "Fly a level, pass marking"

Fly WHAT level? Clearly, the alternative above makes more sense.

 

[rb1957]

it all comes down to punctuation ...

 

[WKTaylor]

My three favorite things are eating my dogs and not using commas.” -Unknown

 

[IRstuff]

He eats, shoots, and leaves

 

[rb1957]

that is such a great series of videos ... "the expert" ... too close to real life, which makes it funny (and sad).

 

[Gr8blu]

Best (grammatical) approach to reduce confusion would have been "While flying a level pass, mark the MSL altimeter that corresponds to 350 ft AGL on the RADAR altimeter"

 

[rb1957]

does "mark" mean "record" or "note and remember" or physically mark (like setting a bug) the altimeter ?

Of course it doesn't mean "mark with a permanent marker" (nor even an impermanent one).

Actually I think the whole statement is "messed up". I think the objective is to determine how high the ground is (above sealevel) ... so record the difference between the Rad Alt reading (above ground) and the (pressure) altimeter reading (above sealevel) once the altimeter is corrected for local air pressure ... at "any" altitude (not 350 ft).

 

[WKTaylor]

My favorite techie quote... from a great guy I used to work with... when he miss-typed...

'Hmmm... It seems my fingers... once again... were faster than my brain.'