[I'm goin' down]

Very interesting replies. I am most grateful.

Peabody's reply helped me put my post in perspective with the other two replies. I changed my bearing "by 12 degrees" to intercept the enemy. I did not change it "to 12 degrees." This apparently means that the ship changed direction. So that leads me to ask, what is the significance of the enemy changing direction? I assume that means it crosses my bow at 0 degrees and that the vessels are proceeding in opposite directions. How do I confirm this, other than the by awareness that the distance between the vessels is increasing? How do I distinguish this situation from one where the enemy is heading away from me by increasing its speed?
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A handsome young guest wearing a zoot suit and named "Jose G. Gonzales" appeared on the original "You Bet Your Life" television show hosted by Groucho Marx. When questioned by Groucho, the guest said that his middle name was Gonzales, and his full name, which Groucho elicited, was "Jose Gonzales Gonzales." A titter ran through the audience. Groucho needed no further prompting. "Does you mother call you 'Jose," "Gozales" or "Jose Gonzales Gonzales"?" to which "Jose Gonzales Gonzales" politely responded, "Oh no, Groucho. She calls me Pedro!" The audience chuckled. Groucho remarked that "Jose, Gonzales or Pedro" was indeded a very funny young man and that they ought to consider becoming a comedy team. Pedro jumped at the possibility and exclaimed that would be fine by him. Groucho inquired, "With all of your different names, what should we name our act?" to which Pedro quick answered, "Gonzales, Gonzales & Marx." Groucho, raising his eyebrows, looked with dismay at the audience, and without skipping a beat, quipped, "How do like that! THIRD MAN BILLING in a two man act!"