On Jan 15, 5:28*pm, Bertie the Bunyip wrote:
"Robert M. Gary" wrote in news:5fdc8536-11f5-4348-993f-
:

Today I was shooting approaches at MHR. Wx was 001OVC 1/8SM. When I
got handed off to tower they would say "Mooney 1234, not in site,
landing own risk, landing runway 22L". That doesn't sound like a
landing clearance to me. What does "landing runway 22L" mean in the
tower ATC phrase book? Why would he tell me that landing was own risk
if he wasn't going to clear me to land?

BTW: It always struck me as odd that a Mooney and a 747 have the same
vis requirements on an ILS. A 1/2 mile is probably like 2 seconds in a
747 but an 1/8 mile is like 10 seconds in a Mooney.

No, usually it's classified by category. On some runways the vis
requirement is the smae, but on some it would be higher for a C or D
airplane. It's mostly down to the OCL.

Bertie

I understand that. On a standard ILS if a cat C is 1/2 mile vis I
believe a cat A should be 1/8 mile vis. The vis requirements should be
based on how many seconds the pilot can see down the runway. I can't
think of any reason why this would not be. A typical GA plane may be
stopped on the runway before a 747 touches down. I think vis
requirements, in general, for GA planes are a bit bogus, at least with
regard to precision approaches.

-robert

-Robert