MSC.1/Circ.1572/Rev.1 – SOLAS Regulations II-1/42 & II-1/43: Emergency Source of Electrical Power

Source: Unified Interpretations of SOLAS Chapters II-1 and XII (MSC.1/Circular.1572/Rev.1), Annex, Section 7 – SOLAS Regulations II-1/42 and II-1/43, Emergency Source of Electrical Power in Passenger and Cargo Ships.
Reference: imorules.com – Section 7

Question 1 of 10
1. Under interpretation 1, "blackout" as used in regulations II-1/42.3.4 and II-1/43.3.4 should be understood to mean: