B757 flight crew had difficulty finding the taxiway intersection during taxi out due to a lack of ai...

Attributes
ACN	518933
Time
Date	200107
Day	Tue
Local Time Of Day	1201 To 1800
Place
State Reference	FO
Altitude	msl single value : 6000
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
ASRS Report	518933
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	518932
Events
Anomaly	ground encounters other non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other controllera other controllerb
Resolutory Action	flight crew : returned to intended or assigned course
Supplementary
Problem Areas	Flight Crew Human Performance Airport ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

Clearance received on ground was climb to 6000 ft on runway heading and turn left on course to proceed via UG449 fpr. After takeoff, piarco tower instructed us to turn left after passing the position 065 degree radial. I verified these instructions with a readback and the tower controller said roger. We turned left after the 065 degree radial, as instructed. A moment later, tower asked about our course. The controller then instructed that we should be outbound on the 065 degree radial. We turned back toward the radial and complied with their instruction. The controller was very abbreviated in all her instructions which contributed to the communication confusion. As I said before, I read back her instructions verbatim and the captain verified my readback. We definitely heard her instructions, but her intentions and directions to us were miscommunicated. No traffic conflicts appeared to have occurred as a result. In addition, for information purposes, there is no airport diagram for the new north terminal. Ramp control and ground control routinely give clrncs to taxi to intersection Z and intersection O and there are no markings for these intxns, either in the airport pubs or on the airport itself.

Original NASA ASRS Text

Title: B757 FLC HAD DIFFICULTY FINDING THE TXWY INTXN DURING TAXI OUT DUE TO A LACK OF ARPT DIAGRAM MARKINGS. IN ADDITION, THEY MISTAKENLY TURNED OFF OF DEP RADIAL PRIOR TO BEING CLRED.

Narrative: CLRNC RECEIVED ON GND WAS CLB TO 6000 FT ON RWY HDG AND TURN L ON COURSE TO PROCEED VIA UG449 FPR. AFTER TKOF, PIARCO TWR INSTRUCTED US TO TURN L AFTER PASSING THE POS 065 DEG RADIAL. I VERIFIED THESE INSTRUCTIONS WITH A READBACK AND THE TWR CTLR SAID ROGER. WE TURNED L AFTER THE 065 DEG RADIAL, AS INSTRUCTED. A MOMENT LATER, TWR ASKED ABOUT OUR COURSE. THE CTLR THEN INSTRUCTED THAT WE SHOULD BE OUTBOUND ON THE 065 DEG RADIAL. WE TURNED BACK TOWARD THE RADIAL AND COMPLIED WITH THEIR INSTRUCTION. THE CTLR WAS VERY ABBREVIATED IN ALL HER INSTRUCTIONS WHICH CONTRIBUTED TO THE COM CONFUSION. AS I SAID BEFORE, I READ BACK HER INSTRUCTIONS VERBATIM AND THE CAPT VERIFIED MY READBACK. WE DEFINITELY HEARD HER INSTRUCTIONS, BUT HER INTENTIONS AND DIRECTIONS TO US WERE MISCOMMUNICATED. NO TFC CONFLICTS APPEARED TO HAVE OCCURRED AS A RESULT. IN ADDITION, FOR INFO PURPOSES, THERE IS NO ARPT DIAGRAM FOR THE NEW N TERMINAL. RAMP CTL AND GND CTL ROUTINELY GIVE CLRNCS TO TAXI TO INTXN Z AND INTXN O AND THERE ARE NO MARKINGS FOR THESE INTXNS, EITHER IN THE ARPT PUBS OR ON THE ARPT ITSELF.

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.

B757 flight crew had difficulty finding the taxiway intersection during taxi out due to a lack of airport diagram markings. In addition, they mistakenly turned off of departure radial prior to being cleared.