B737 flight crew reports GPWS warning descending to 10000 feet on the mrn 1A arrival to skrg.

Attributes
ACN	789384
Time
Date	200806
Local Time Of Day	1201 To 1800
Place
State Reference	FO
Altitude	msl single value : 11000
Environment
Flight Conditions	VMC
Aircraft 1
Controlling Facilities	tracon : skrg.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	descent : approach
Route In Use	arrival star : mrn
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	789384
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment : gpws other flight crewa
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft Environmental Factor
Primary Problem	Environmental Factor

Narrative:

Flying the mrn 1A rng transition; we had a terrain warning. We were in VMC and there was no threat to our flight. We were flying the arrival as published. Had we been in IMC we would have had no choice but to execute the escape. The arrival is safe; but there needs to be some additional notes on the arrival plate and also on the chart warning of such possibilities; such as gong slow and delaying descent until well inbound.

Original NASA ASRS Text

Title: B737 FLT CREW REPORTS GPWS WARNING DESCENDING TO 10000 FEET ON THE MRN 1A ARRIVAL TO SKRG.

Narrative: FLYING THE MRN 1A RNG TRANSITION; WE HAD A TERRAIN WARNING. WE WERE IN VMC AND THERE WAS NO THREAT TO OUR FLT. WE WERE FLYING THE ARR AS PUBLISHED. HAD WE BEEN IN IMC WE WOULD HAVE HAD NO CHOICE BUT TO EXECUTE THE ESCAPE. THE ARR IS SAFE; BUT THERE NEEDS TO BE SOME ADDITIONAL NOTES ON THE ARR PLATE AND ALSO ON THE CHART WARNING OF SUCH POSSIBILITIES; SUCH AS GONG SLOW AND DELAYING DSCNT UNTIL WELL INBOUND.

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.