A good belayer should be dedicated to the climber's safety. Here is a reminder of essential practices, valid with any equipment.

1. Do a partner check before each climb.

After choosing a route, the climber verifies that the rope length is suitable. He/she also verifies that the climber/belayer weight difference is not excessive. Before climbing, belayer and climber check each other's equipment setup: the partner check.

2. Spotting a climber before the first protection point.

Spotting can help reduce the consequences of a fall in the first few meters of a climb, before the climber has clipped the first protection point. Spotting is not about catching the climber, but helping avoid the consequences of a bad fall: it's about guiding the fall so that the climber lands correctly in a good location and does not flip over backwards.

3. Universal technique for correct use of a belay device

This hand position is valid regardless of the device used: tube, GRIGRI, REVERSO...
Your hand must never let go of the brake-side rope.

4. Vigilance, anticipation and mobility

The belayer's role is not limited to giving slack quickly and at the right time. By staying focused on the climber, the belayer can recognize the stressful moments that require the greatest precision and responsiveness.

5. Stopping a fall

In case of a fall, hold the brake-side rope firmly, while pulling it downward. Whatever the device used, the act of gripping the brake-side rope with your hand increases the rope friction in the device, allowing the fall to be stopped.

6. Communicating after a fall and before lowering

Communication should allow the two partners to avoid being surprised by the movements of the other, to avoid any error. It's not effective to have long discussions, it's better to use terms agreed upon in advance, such as "ok", "go", "take", "climb"...

7. Lowering

When the climber is ready to be lowered, after the agreed-upon signal, s/he is lowered on the rope and has no way of controlling the descent. All responsibility for this operation is on the belayer, who holds the climber's life in his hands.

【轉(zhuǎn)自：https://www.petzl.com/US/en/Sport/Good-practices-for-belaying-a-lead-climber?ActivityName=Rock-climbing】