Lambchop. .PICUS or P1S can be used when having a check ride, ie, a flying school check before you hire an aircraft. You already have the rating, but are being checked out by an instructor. In these circumstances the Instructors name goes in the as Captain but you get the time as in Command.. .SPIC this is used when doing your Commercial flight training, when a certain amount of the flying can be done with an instructor on board. If the instructor is happy that he had no part to play in the flight then the student can log it as SPIC. .When you are training for additional ratings, such as Multi or IMC, this must be logged as P/ut, because you don't actually have that rating yet. Once you have the rating and do some practice with an Instructor then it can go in as PICUS.. .Hope this helps!