A B737-200 FLT CREW FAILED TO MEET A XING RESTR.

Narrative

THE CAPT WAS FLYING THE CAMRN 3 ARR. I HAD NOTICED THE DSCNT RATE WAS NOT ENOUGH TO CROSS HOGGS INTXN AT FL180 AS ASSIGNED; SO I QUESTIONED AS TO IF HE WOULD MAKE IT. I MENTIONED IT AT LEAST 3 TIMES. THE CAPT THOUGHT HOGGS WAS AT 46 DME NOT 38 DME. 46 DME IS ACTUALLY PANZE INTXN. WELL; WE CROSSED AT LIKE FL195 AND ATC SAID NOTHING. SO IT SEEMS IT DID NOT CAUSE A TFC CONFLICT PROB. 3 REASONS I BELIEVED THIS HAPPENED OTHER THAN THE OBVIOUS ONE OF MISREADING A CHART BY THE CAPT:. 1) I'M A FIRST YR FO ON PROBATION AND WORRIED FOR MY JOB. EACH FLT WE DO; THE CAPT WRITES A REVIEW OF OUR PERFORMANCE AND I DID NOT WISH TO MAKE THIS PERSON UPSET WITH ME. 2) I NEEDED TO BE SPECIFIC AND ASK 'ARE WE GOING TO MAKE THE XING RESTR AT 38 DME?' I NEEDED TO BE MORE ASSERTIVE UNTIL I HAD AN ANSWER. LACK OF COM; AS I NEVER HEARD A RESPONSE FROM THE CAPT. I THOUGHT HE HEARD ME AS EVERY TIME I ASKED HE DID INCREASE RATE OF DSCNT. I NEEDED TO VERBALLY HEAR AN ANSWER INSTEAD OF ASSUMING BECAUSE HE LOOKED LIKE HE WAS TRYING TO CORRECT; BUT IN FACT NEVER HEARD MY QUESTIONING. 3) WE DO NOT USE A COCKPIT INTERCOM SYS ON THIS ACFT AND I BELIEVE IT IS A SAFETY ISSUE AS IT IS HARD TO HEAR EACH OTHER IN A NORMAL FLYING EVENT; LET ALONE IF SOMETHING WENT WRONG AND WE NEEDED TO COM OVER MORE NOISE. IN THE FUTURE I WILL BE SURE TO GET A VERBAL RESPONSE TO MY QUESTIONING.