CMN meaning in Space Science ?

Answer:

What is Crewman mean?

Crewman is a generic term for a crew member serving in the operation of an aircraft, naval vessel, or train. The term may also refer to individuals serving in a military capacity on weapon system platforms, such as those operating a tank.

In some science fiction (most notably Star Trek), crewman is the lowest military rank on board a spacecraft, analogous to seaman in many real world navies.

The term "crewman" may also be used interchangeably with the non-gender specific form as "crewperson" or "crewmember".

reference

Full Form	Category
Cepstral Mean Normalization	Academic & Science
Clinton-Macomb Public Library, North Branch	Academic & Science
College of the Muscogee Nation	Academic & Science
Click Multimedia News	Business
Cárdenas Marketing Network	Business
Catholic Marketing Network	Business
Consumer Media Network	Community
Catholic Media Network	Community
Christian Men's Network	Community
Conscious Media Network	Community
Catholic Mobilizing Network	Community
Common Music Notation	Community
Children's Music Network	Community
Canadian Museum of Nature	Community
Church Multiplication Network	Community
Christian Music Network	Community
Common information	Computer and Networking
Crypto Media Network	Cryptocurrency
College of Menominee Nation	Educational Institute
Children's Miracle Network	General
Creator Moderator And Narrator	General
Congenital Melanocytic Naevus	General
Card Moran and Newell	General
Congenital Mesoblastic Nephroma	General
Call Me Now	General
Congenital Melanocytic Nevi	General
Coherent Mesh Network	General
Club Miata Northwest	General
Chief Mineman	Governmental
Certificate Of Medical Necessity	Medical
Certification of Medical Necessity	Medical
Configuration Management Network	Military and Defence
Community Media Network	Networking
Mohamed V Airport, Casablanca, Morocco	Regional
Crewman	Space Science