Mr. Blom, the son of a steelworker and a librarian, was born in Corona, N.Y., and raised in Baker, La.
After graduating from Baker High School in 1941, where he had been an outstanding football player, Mr. Blom enlisted in the Army Air Forces.
Trained as a radio operator and top-turret gunner, Mr. Blom flew 38 combat missions in Europe aboard bombers.
After the war, he studied geology under the GI Bill of Rights at Louisiana State University, where he earned bachelor's and master's degrees.
He worked for the Army Corps of Engineers briefly before joining the NSA, where he worked at Fort Meade as an analyst for more than 30 years until retiring in 1987.
In recognition of his work with the NSA, Mr. Blom was awarded the Meritorious Civilian Award in 1981 and the Exceptional Civilian Service Award in 1984.
The longtime Dayton resident, who moved to the Catonsville retirement community three years ago, had been a Little League coach. In addition to being an avid sports fan, he enjoyed handball, golf and skiing.
He also enjoyed reading about world history and international politics, and action and espionage fiction.
Mr. Blom was a longtime member of St. Louis Roman Catholic Church, 12500 Clarksville Pike, Clarksville, where a Mass of Christian burial will be offered at 10 a.m. today.
Surviving are his wife of 56 years, the former Grace Rita Gemmellaro; five sons, Paul Blom of Dayton, Daniel Blom of Valkaria, Fla., Darren Blom of Jacksonville, Fla., Kevin Blom of Orlando, Fla., and Steven Blom of Helena, Mont.; and nine grandchildren. Another son, Michael Blom, died last month.
- Frederick N. Rasmussen