newbie needing advice/information

[Alex Stjepanovic]

The little box is the altitude yes. In Chino's case, [-27] indicates that it goes up to-below 2700(As Ontario Class Charlie outer shelf goes between 2700 and 5000).

You can have a look at the symbols here: http://aeronav.faa.gov/index.asp?xml=ae ... aero_guide

[Fatcharlie]

That's really useful - thanks Alex.