Chartwork # 4

Additional Questions on Distance Speed and Time (60D=S*T)

Refer to your chart: “Western Long Island Sound” and apply what you learned in:

 

Chapter #11

 

1. With reference to the three journeys we have been working with, please determine the distance from the two points given below  (distances are expressed in “tenth’s” of nautical miles, i.e.   6.8 NM     not     6 NM     and     not 6.78 NM).   Answers may be considered correct if they are “plus or minus” one tenth of a Nautical Mile.

                                                                                                                        DISTANCE

 

1.1  Darien’s G”1” to G”1” Fl G 2.5 sec at Eatons’ Neck              _________NM

 

1.2  Darien’s G”1” to G”15”  GONG,  North of Lloyd Point                       _________NM

 

1.3  Smith Reef R”30” to Stamford’s R “32” at The Cows                        _________NM

 

 

2. Now, assuming the breeze is fair and you are in a sail boat that will move along at 5.0 knots  (what a wonderful day!), lets figure out the time that it will take to travel one of these courses.    Therefore - for the Distance (D) that you found, above, using “5.0” as the value for Speed (S), use the formula  60 D Street  (60*D=S*T) to determine the number of minutes it will take to make the trips:  (Time is expressed in “whole” minutes)

            Darien’s G”1” to G”1” Fl G 2.5 sec at Eatons’ Neck         _________Minutes @ 5.0 knots

 

 

3. In fairness to the non-sailors, lets assume that you are able to get up on a plane and travel along at 18.5 knots in your runabout.  Use the same 60 D Street formula, this time with 18.5 as the value for Speed.

            Darien’s G”1” to G”1” Fl G 2.5 sec at Eatons’ Neck         _________Minutes @ 18.5 knots

 

 

4.  Your GPS (or your LORAN) reads      40° 58.10’ N     73°  32.80’  W

            What navigational aid are you near?                                                          __________

            What is the TRUE course to Greens Ledge Light?                                   __________

            What is the COMPASS (Magnetic) course to Greens Ledge Light        __________

            At the speed of 5.5 knots, how long will it take for you to get there?       __________

            The time is now 1234, what time will it be when you get there?  __________

 

 

5.  You are departing Bridgeport at RW ‘BH’  and crossing the sound to Port Jefferson’s entrance buoy at RW ‘PJ’   The time is now 1400, your speed is 12 knots

            What is the compass course you should follow?                           __________

            After 15 minutes - what is the depth of the water?                                    __________

            What time SHOULD you get to RW “PJ” ?                                                __________

            You arrive at RW “PJ” at 1448, what has been your speed?                   __________