Hydraulic hot stabs are designed for system pressure make and break by ROV.

• A. Self-sealing mono-couplings
• B. BSP
• C. Hydraulic hot stabs
• D. Crimp fittings

Answer: (C)

Hydraulic hot stabs are built to connect and disconnect a live hydraulic line under system pressure using an ROV. They seal and/or open a valve as the two halves mate, so pressure can be maintained and flow started or stopped without depressurizing the system. This capability is essential for subsea operations where an ROV needs to make or break a connection while the line remains pressurized, resisting the harsh underwater environment and high pressures.

Other options describe types of fittings that aren’t designed for making or breaking a live, pressurized connection by an ROV: BSP is simply a thread standard, crimp fittings are fixed assemblies, and self-sealing mono-couplings aren’t specifically for controlled, pressurized make/break under ROV manipulation.