How would you use spherical trigonometry aboard a cruising boat?
Send your answers to cruisingcompass@bwsailing.com. A winner will be selected randomly from the correct answers and will win a one-year subscription to the digital version of Blue Water Sailing magazine.
Congratulations to Dan McKee of Fairhaven, MA who emailed the correct answer to last week’s Mindbender: “Cirrus clouds and a visible contrail behind airliners usually means there is a lot of moisture in the atmosphere and that rain is likely in the next 24 hours.”