[greetings]

Call backs! A really good practice. As having also worked on a historical ship the bit that always gets me is when working on helm when needing to communicate our heading we say "one five three" rather than "one hundred fifty three" and then that is repeated back.

Makes it much more difficult to make mistakes this way.

[nhf]

Same in aviation, the ICAO phonetic alphabet is meant to reduce uncertainty over historically poor radio communications. Plus readback to air traffic control and so on is relatively standardized to allow for a few chances to realize you got the wrong thing down.