What is an essential factor to monitor during an investigation for potential leaks?

Monitoring pressure levels on connected systems is crucial during an investigation for potential leaks because fluctuations in pressure can indicate where a leak may be occurring. High or low pressure in systems such as fuel, water, or hydraulic lines can point to compromised integrity, allowing investigators to pinpoint areas that require immediate attention. By analyzing the pressure levels, they can assess whether the system is operating within safe parameters and determine if there's an issue that needs addressing.

This focus on pressure levels helps ensure that any leaks are identified before they lead to more significant problems, such as system failures or safety hazards. Understanding the dynamics of pressure across various systems is integral to maintaining vessel integrity and safety.