🔍 Key Concepts

• Bosun's chair rigging and safety purpose • Difference between a gantline (hoisting line) and tail block / lizard • How to control the movement and position of a person working overside or aloft

💭 Think About

• Think about what problem a tail block or lizard is designed to solve when someone is working in a bosun’s chair: is it about hoisting, guiding, or stabilizing? • Which of the listed options sounds more like the job of the main gantline, and which sounds more like an extra fitting used alongside it? • Consider how you would prevent a person in a chair from drifting away from the work area or structure they’re working on.

✅ Before You Answer

• Identify which option describes the primary function of the gantline itself and eliminate that one from being the tail block/lizard’s job • Ask whether a tail block / lizard would be attached to the main hoisting line or to a fixed structure (like a stay, mast, or rail) to control position • Verify which option best matches controlling the chair’s lead or position relative to the ship’s structure, not just raising or lowering it