Background: DW and I recently spent time day hiking in Southern Utah. At Bryce Canyon we hiked down a steep switchback with a drop of ~400'. We went around a corner and found a woman with an very swollen ankle. There was no chance of her hiking back up w/o help. I went back up the trail 100' until I was visible below a popular view point. Looking up I blew my whistle three (3) times asking for help. Using hand signals I let them know we needed help. The rangers were with the woman w/in 30 minutes to help her out.

Scenario: You're hiking and your partner becomes injured. It's not life-threatening so the PLB is out. The person is given water, food and shelter. You go to get help with your whistle. Do you whistle and keep moving? Do you constantly blow and keep moving? When and how should I use the whistle?

I understand each situation is different. Just curious...