A B737-400 FLT CREW REPORTS ATC COM IS FREQUENTLY DISRUPTED BY RAAS ALERTS.

Narrative

DURING TAXI TO RWY 27 AT SAN THE RWY ADVISORY ALERT SYS ELECTRONIC CALLOUT COVERED THE TWR'S 'ACR X TAXI INTO POS AND HOLD.' WE HAD TO ASK FOR A READBACK. THE RWY ADVISORY ALERT SYS CAME WITHIN A SECOND OF COVERING THE 'CLRED FOR TKOF' CLRNC. ON ARR INTO ZZZ; THE RWY ADVISORY ALERT SYS ELECTRONIC CALLOUT COVERED THE TWR'S CLRNC TO 'CROSS RWY 28L' AND WE AGAIN HAD TO ASK FOR A REPEAT. THE RWY ADVISORY ALERT SYS NEARLY COVERED OTHER ATC COMS DURING THE 3-LEG DAY IN THE ACFT FROM ZZZ2 TO ZZZ1 TO SAN TO ZZZ. ALTHOUGH NO RWY INCURSIONS OR CREW ERRORS RESULTED FROM THESE EVENTS; THE POTENTIAL WAS QUITE HIGH. I HAD THE EXACT SAME ISSUE ON A FLT OUT OF SAN DURING THE MONTH OF MARCH IN A DIFFERENT RWY ADVISORY ALERT SYS EQUIPPED ACFT. IN THAT EVENT; THE RWY ADVISORY ALERT SYS COVERED THE CTLR'S 'TAXI INTO POS AND HOLD RWY 27 EXPECT AN IMMEDIATE; TFC ON A 2 MI FINAL.' WE HAD TO ASK FOR A REPEAT AND THE RWY ADVISORY ALERT SYS NEARLY COVERED THE CLRNC FOR IMMEDIATE TKOF WITH TFC ON SHORT FINAL. THIS IS NOT A SAN PROB; THE RWY ADVISORY ALERT SYS COVERS ATC AT ALL ARPTS WITHOUT DISCRIMINATION. REMOVE THE RWY ADVISORY ALERT SYS -- IT IS A HUGE DISTR DURING A CRITICAL PHASE OF FLT AND IS A SAFETY ISSUE. THERE ARE OTHER PASSIVE TECHNOLOGIES THAT PROVIDE BETTER CREW SITUATIONAL AWARENESS WHILE TAXIING. THE VOICE ALERTS ARE THE HEART OF THE RWY ADVISORY ALERT SYS AND THEY ARE ALSO THE CAUSE OF THE SAFETY PROBS INHERENT IN THE SYS. IT NEEDS TO BE REMOVED ASAP BEFORE IT CAUSES A RWY INCURSION OR SIMILAR EVENT. WE MUST BE ABLE TO COMMUNICATE WITH ATC AND THE RWY ADVISORY ALERT SYS PREVENTS THAT ON A REGULAR BASIS.