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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Flight crew-controller confusion over salop intersection and calup (apparently with a soft 'C') intersection.
| Attributes | |
| ACN | 166835 |
| Time | |
| Date | 199101 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : pie |
| State Reference | FL |
| Altitude | msl bound lower : 37000 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 160 flight time total : 9000 flight time type : 320 |
| ASRS Report | 166835 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
This concerns a potential problem with similar intxns. Our large transport was en route ind to cun overhead tlh, direct crabi, direct covia, direct cigar. ZJX issued revised routing, 'tlh direct, calup direct cigar, flight plan route.' we read back this clearance as tlh direct calup (with a hard-sound 'C'), etc, and center acknowledged. Clearance was typed into FMC/CDU and we proceeded. Just overhead tlh, center asked to confirm that we were proceeding direct calup (soft 'C' sound) direct cigar. I confirmed spelling, 'C-a-left-U-P.' center said his calup (soft 'C') was 'south-a-left-O-P,' just northwest of pie. After some confusion, we proceeded to salop through cigar. Here's the problem. Calup (with a hard or soft 'C') is just abeam cigar intersection (i.e., with a soft 'C'). I read back with a hard 'C' and controller did not catch. Discussing the clearance, tlh center advised that salop was on J41 northwest of pie. However, salop is actually on V97 (!!) on the low en route chart. It does not appear on high chart. Salop and calup (if read with soft 'C' as being next to cigar) are confusing and should be renamed. Also, ATC should advise when clearance point is on a low vs high chart.
Original NASA ASRS Text
Title: FLT CREW-CTLR CONFUSION OVER SALOP INTXN AND CALUP (APPARENTLY WITH A SOFT 'C') INTXN.
Narrative: THIS CONCERNS A POTENTIAL PROB WITH SIMILAR INTXNS. OUR LGT WAS ENRTE IND TO CUN OVERHEAD TLH, DIRECT CRABI, DIRECT COVIA, DIRECT CIGAR. ZJX ISSUED REVISED RTING, 'TLH DIRECT, CALUP DIRECT CIGAR, FLT PLAN RTE.' WE READ BACK THIS CLRNC AS TLH DIRECT CALUP (WITH A HARD-SOUND 'C'), ETC, AND CENTER ACKNOWLEDGED. CLRNC WAS TYPED INTO FMC/CDU AND WE PROCEEDED. JUST OVERHEAD TLH, CENTER ASKED TO CONFIRM THAT WE WERE PROCEEDING DIRECT CALUP (SOFT 'C' SOUND) DIRECT CIGAR. I CONFIRMED SPELLING, 'C-A-L-U-P.' CENTER SAID HIS CALUP (SOFT 'C') WAS 'S-A-L-O-P,' JUST NW OF PIE. AFTER SOME CONFUSION, WE PROCEEDED TO SALOP THROUGH CIGAR. HERE'S THE PROB. CALUP (WITH A HARD OR SOFT 'C') IS JUST ABEAM CIGAR INTXN (I.E., WITH A SOFT 'C'). I READ BACK WITH A HARD 'C' AND CTLR DID NOT CATCH. DISCUSSING THE CLRNC, TLH CENTER ADVISED THAT SALOP WAS ON J41 NW OF PIE. HOWEVER, SALOP IS ACTUALLY ON V97 (!!) ON THE LOW ENRTE CHART. IT DOES NOT APPEAR ON HIGH CHART. SALOP AND CALUP (IF READ WITH SOFT 'C' AS BEING NEXT TO CIGAR) ARE CONFUSING AND SHOULD BE RENAMED. ALSO, ATC SHOULD ADVISE WHEN CLRNC POINT IS ON A LOW VS HIGH CHART.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.