I used an online map tool to determine distances between various locations and an app to convert them to Nautical Miles, usually rounding up.  

        I checked some against my electronic charts and they seem to be accurate.

        These are mostly straight line distances, sometimes crossing land.  Actual sailing distances  will be greater.  But this is an acceptable basis for comparison and planning.

            San Diego to         Honolulu                   2300

            Cape Horn to        Cape Town              3600

                                            Auckland                 4400

                                            Honolulu                   6500

                                            San Diego                5900

                                            Papeete                   4300

                                            Falkland Islands         400

            Cape Town to       Hobart                      5500

                                            Auckland                 6400

                                            Perth                         4700

            Hobart to               Bay of Islands           1400             

                                            (actual sailing distance; not straight line)

            Auckland to          Honolulu                    3900

                                            San Diego                 5700

            Honolulu to            40ºS, 160ºW                3700

            40ºS, 160ºW to        Cape Horn                3700

                                                                                7400

                            (this more accurately reflects true sailing        

                                distance with prevailing winds)

            weight of 1 gallon of fresh water:   8.34 pounds

            fresh water consumption per day:    .5 gallon/4.17 pounds

            weight of fresh water for 90 days:        375 pounds

            GANNET’s designated displacement:        2050 pounds

            average day’s run in GANNET:        unknown

            suggested strokes per minute Katadyn Power Survivor 35:    30

            number of minutes to produce .5 gallon of fresh water:  25

            strokes to produce .5 gallon of fresh water:   750