Pick one for the job cover-image picker (Mark's request). Drilling-equipment image (already chosen) shown at the bottom for context. All 600×400 (3:2).
Option CsuggestedRed crane on an orange barge, open sea — clean, uncluttered, crane is the clear subject.
Option BLattice crane lifting a clamshell bucket onto a barge at sea — working / heavy-lift action.
Option APedestal crane with spreader-beam rigging against blue sky — strong detail; background reads harbor.
Option DDavit lowering a lifeboat with crew working — great action, but it's lifeboat-handling gear, not a cargo crane.
Current (in PR #184)Original index-45 shot — crane boom at left, busier platform deck. The one we'd replace.