We are beginning to see small access and inspection panels, and two very large features that must be entry locks.

The law also requires lighting, mirrors, safety notices and electronic entry locks.

An entry lock formed a dark well next to one giant manipulator.

It included a new diversion dam, an entry lock, and a waste weir.

They progressed along the cable until their entry lock behind them had shrunk to a small black dot.

"What about the dive tanks we left in the entry lock?"

The hatch on the entry lock is jammed against the coral.

Had the entry lock been closed behind them when their party entered the Idris?

Bragdon was still grinning as he walked to the entry lock.

The entry lock was low enough that she had to duck.