Additional Crew - Terminology

[Sawbones]

I am preparing a new Pilots' Logbook and would like to solicit advice from crews worldwide.

My question: What term does your Company use to refer to the position of:

- Relief Pilot,
- Augment First Officer,
- Additional Crew,
- Cruise Relief Pilot, etc. ?

Thank you in advance for your feedback

[MarkerInbound]

After we listed the PIC, SIC and F/E, everyone else was ACM, Additional Crew Member.

[Willit Run]

IRP for a 3rd person on the 744

[Tankengine]

3 Pilot crews we have Captain, First officer, Second officer.
4 Pilot crews we have Captain, First officer 2 x Second officers.
Qantas First officers have command endorsements and have "command in cruise"
[no FEs left]

[hetfield]

3 Pilot crews we have Captain, First Officer and Senior First Officer who is in command during cruise when the Captain rests.

[Sawbones]

All good comments ... many thanks for the input.

Cheers