Which operational code signifies working aloft or over the side?

The operational code that signifies working aloft or over the side is indeed "KILO." This code is part of a set of standard phonetic alphabet signals used in maritime communication to convey specific operational conditions or activities. When "KILO" is communicated, it clearly indicates to personnel that there will be activities occurring above the deck or on the side of a vessel, necessitating extra caution and awareness for safety.

In the context of maritime operations, understanding these codes is crucial for maintaining safety and ensuring that crew members and any personnel in the area are informed about potentially hazardous work situations. The use of standardized codes helps to avoid confusion and enhances communication efficiency in environments where clarity is vital.