Quick question on the logging of flight time in multi crew aircraft. CFR 61.51 G states that "A person may log instument time only for that flight time when the person operates the aircraft solely by reference to instuments under actual or simulated conditions....." Elsewhere the FARs state flight time requirements as "sole manipulator of the controls". The USN/USMC governing documents state that both the Pilot and Copilot both log actual time under actual conditions and both log night time the same. How do the 121 and 135 operators interpret logging of flight time under actual conditions/ night time? I appreciate your insight in the matter.