GB/T 3 2065.7 - 2015 "Marine instrument environmental test methods, Part 7: Alternating humidity cabinet test" specifies the test requirements and procedures for marine instruments in alternating heat and humidity environments. The standard is used to evaluate the use and storage adaptability of marine instruments under heat and humidity conditions such as temperature cycling and surface condensation, to ensure their performance and Reliability in practical applications. The standard describes the implementation steps and related requirements of the test in detail, providing a systematic test basis for the performance of marine instruments in complex environments. Applicable normative references include GB/T 3 2065.1 - 20 1 5 Methods for environmental testing of marine instruments, Part 1: General.