BE55 pilot suggests the entry and exit latitude/longs for the north south corridors on the grand can...

Attributes
ACN	797950
Time
Date	200807
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : gcn.airport
State Reference	AZ
Altitude	msl single value : 12500
Environment
Flight Conditions	VMC
Weather Elements	Thunderstorm
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zab.artcc
Operator	general aviation : personal
Make Model Name	Baron 58/58TC
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 50 flight time total : 10000 flight time type : 250
ASRS Report	797950
Events
Anomaly	aircraft equipment problem : less severe inflight encounter : weather
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Chart Or Publication Flight Crew Human Performance
Primary Problem	Chart Or Publication

Narrative:

Using the corridors to transit the canyon sbound in accordance with the sfar chart. Originally planned to use the more western corridor; but due to developing thunderstorm changed to use the eastern corridor. The problem was that the latitude/long labeling of the entry and exit waypoints is rather confusing; which takes more time and creates data input errors. This makes for inaccurate navigation of the corridors. It would be useful if these important fixes had bold type for the latitude/long information and perhaps they were added to the intersection databases; so that they are preloaded into the GNS. Also there is a restr area style marking around point imperial; but I can find no mention of flight restrs anywhere on the chart. If this area needs to be avoided then the center of the area (since it is a circle) needs to be labeled with the latitude/long; otherwise it is difficult to determine its exact location. The flight was conducted safely in deference to the thunderstorms and terrain; but it could have been much cleaner with better navigation information.

Original NASA ASRS Text

Title: BE55 PLT SUGGESTS THE ENTRY AND EXIT LAT/LONGS FOR THE NORTH SOUTH CORRIDORS ON THE GRAND CANYON SFAR CHART ARE DIFFICULT TO READ AND IMPEDE NAVIGATION.

Narrative: USING THE CORRIDORS TO TRANSIT THE CANYON SBOUND IN ACCORDANCE WITH THE SFAR CHART. ORIGINALLY PLANNED TO USE THE MORE WESTERN CORRIDOR; BUT DUE TO DEVELOPING TSTM CHANGED TO USE THE EASTERN CORRIDOR. THE PROB WAS THAT THE LAT/LONG LABELING OF THE ENTRY AND EXIT WAYPOINTS IS RATHER CONFUSING; WHICH TAKES MORE TIME AND CREATES DATA INPUT ERRORS. THIS MAKES FOR INACCURATE NAV OF THE CORRIDORS. IT WOULD BE USEFUL IF THESE IMPORTANT FIXES HAD BOLD TYPE FOR THE LAT/LONG INFO AND PERHAPS THEY WERE ADDED TO THE INTXN DATABASES; SO THAT THEY ARE PRELOADED INTO THE GNS. ALSO THERE IS A RESTR AREA STYLE MARKING AROUND POINT IMPERIAL; BUT I CAN FIND NO MENTION OF FLT RESTRS ANYWHERE ON THE CHART. IF THIS AREA NEEDS TO BE AVOIDED THEN THE CTR OF THE AREA (SINCE IT IS A CIRCLE) NEEDS TO BE LABELED WITH THE LAT/LONG; OTHERWISE IT IS DIFFICULT TO DETERMINE ITS EXACT LOCATION. THE FLT WAS CONDUCTED SAFELY IN DEFERENCE TO THE TSTMS AND TERRAIN; BUT IT COULD HAVE BEEN MUCH CLEANER WITH BETTER NAV INFO.

Data retrieved from NASA's ASRS site as of May 2009 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.

BE55 pilot suggests the entry and exit latitude/longs for the north south corridors on the grand canyon sfar chart are difficult to read and impede navigation.