A practical test of whistles? Yup. It’s right there on page 184 in “Safety and Survival.” If you own a good old boat, you need this book. This book was created from articles publishe...
A practical test of whistles? Yup. It’s right there on page 184 in “Safety and Survival.” If you own a good old boat, you need this book. This book was created from articles publishe...