The only thing I would caution you about is that it is not always the "safest" thing to give someone a compass course based on your own boat's compass, or fro ma plotted course on a chart. The "danger" is that yo udo not know how accurate their compass is, and in this case it sounds like the "boaters" did not really have firm grasp on how to read the compass in the first place. A few degrees off on their compass (Remember, Deviation is different for every boat due to the various magnetic forces on that boat) and they could easily miss the island they were heading for. One thing, you could always just tell them to head due East, that would take them beck to shore and safety until they took a course in basic coastal navigation?
That said, I figure that I too woukd have bee nvery concerned about those two. and probably would have done most of the same things that yo udid to help them. One additional thought, it might have been worth a call (on cell phone if possible for privacy) to the local USCG station or unit to alert them to the situation. Not ask them to "rescue" these two who had no business out where they were, but just to give the USCG a "heads up" to what you observed. That way the USCG could keep an eye out for this boat, while out on patrol, they would most likey alert any USCGAUX Operational Facilities patroling that area as well, again... not to terminate the voyage, but just be aware of their situation. That way if something DID happen and they got "lost", the USCG would have a place to start the search and have a description of the boat. Most likely, if these two were as clueless as you say, they probably would not have let anyone know where they were going and when they planned to return (in other words, leave a "Float-Plan" with someone on shore) so no one would know they were "missing" and overdue until it was too late.
That said, I figure that I too woukd have bee nvery concerned about those two. and probably would have done most of the same things that yo udid to help them. One additional thought, it might have been worth a call (on cell phone if possible for privacy) to the local USCG station or unit to alert them to the situation. Not ask them to "rescue" these two who had no business out where they were, but just to give the USCG a "heads up" to what you observed. That way the USCG could keep an eye out for this boat, while out on patrol, they would most likey alert any USCGAUX Operational Facilities patroling that area as well, again... not to terminate the voyage, but just be aware of their situation. That way if something DID happen and they got "lost", the USCG would have a place to start the search and have a description of the boat. Most likely, if these two were as clueless as you say, they probably would not have let anyone know where they were going and when they planned to return (in other words, leave a "Float-Plan" with someone on shore) so no one would know they were "missing" and overdue until it was too late.