Here are a couple more sources:
USS Enterprise CV-6 - Operations Manual - Damage Control (Chapter 43): http://www.cv6.org/ship/logs/ops/ops_chap_43.htm
Logo by - USS Whitehurst Home Page: http://www.de634.org/facts.htm
It is common in high threat areas to go to the highest degree of readiness a half hour before sunrise and a half hour before sunset and remain in that condition for about an hour. These are the most critical times for an attack.
Circle D fittings are closed in the "Darken Ship" Condition, i.e. battle readiness at night.
Material Condition referred to what was happening with the physical environment of the ship. During wartimes, Baker and Affirm were the most common.
Material Condition Baker ? The ship is alert to possible problems. Procedures are in place to make the ship as water-tight as possible but still continue with a reasonably comfortable living environment.
Material Condition Affirm - It took about 30 minutes to move from Baker to Affirm where ?living conditions became secondary to the requirements of water-tight and air-tight integrity.? Everything on the ship would we stowed for safety and all systems were put in a ?safety first? battle ready condition. By the time Material Condition Affirm was instituted, fire controlmen and other battle positions were in place.
NOTE: You will find both Material Condition Aff
irm and Material Condition Af
irm. This seems to be the same as Material Condition Able.