Thanks Joe,A breaker within sight of the compressor can be considered a disconnect.
So can a cord and plug if the compressor has one.
Compressor is a Puma 60 gallon with a 5HP motor and the book says is should be hardwired so I am going to use a 6' cable hardwired to the junction so I can move it away from the corner if and when it needs servicing. Here's a pic of where it will be going. Breaker and compressor will be within an arms reach of each another.