Google for "LAX noise abatement" returned this
http://www.lawa.org/airops/pdf/Secti..._Abatement.pdf

c. Unless specifically instructed otherwise by ATC, pilots
of all aircraft

departing toward the west shall, in accordance with
Subsection 4,

maintain runway heading until past the shoreline before

commencing any turns.



Good guess




--
James H. Macklin
ATP,CFI,A&P


"Jim Macklin" wrote
in message news:8jhpf.29494$QW2.4566@dukeread08...
| Just a guess, a local noise abatement rule.
|
|
|
| wrote in message
|
ups.com...
|| In the summer taking off from LAX for JFK a sign at the
| end of the
|| runway or thereabouts read no turns until over the water.
| Why is this
|| sign necessary for pilots? Don't they know that already?
|| An interested passenger
||
|
|