"Jeff Saylor" wrote in message
...

Ok, I get that, but what makes this information useful to the pilot?


It tells the pilot where ASR is located when there is no other indicator and
how to obtain radar services.



For example, what is available to a pilot landing at Nantucket (Class
D, Cape Approach, R-in-circle) that is not available at Vineyard
Haven (Martha's Vineyard with Class D, Cape Appraoch, No
R-in-circle)? Both airports have a number of approaches,
including ILS that controllers can vector pilots to.


If you're operating IFR it's not an issue. If you're operating VFR, you
wouldn't know that radar services were available if the information was not
published somewhere. What better place to put it than the sectional, the
publication most used by VFR pilots?