Cor­nell's Ocean At­las

by Jimmy and Ivan Cor­nell (sec­ond edi­tion, 2018; Cor­nell Sail­ing Ltd.; $80)

Cruising World - - Under Way - —Mark Pills­bury

Any­one plan­ning an ex­tended voy­age will find a use­ful tool in the just-up­dated and rere­leased sec­ond edi­tion of Cor­nell’s

Ocean At­las, a book chock-full of pilot charts and tips for sail­ing the world’s oceans.

The book is the hand­i­work of au­thor and cir­cum­nav­i­ga­tor Jimmy Cor­nell and his son, Ivan, also a sailor and a com­puter sci­en­tist who de­vel­oped a pro­gram to col­lect and process weather data from a num­ber of sources, in­clud­ing NOAA satel­lite ob­ser­va­tions.

The Cor­nells pub­lished their first col­lec­tion of pilot charts in 2012, based on 20 years’ worth of satel­lite data. Pre­vi­ously, pilot charts re­lied mostly on ship­board weather ob­ser­va­tions.

The new at­las in­cludes 80 monthly pilot charts, show­ing wind speed and di­rec­tion, currents, the ex­tent of the In­tertrop­i­cal Con­ver­gence Zone, com­mon tracks of trop­i­cal storms and the mean lo­ca­tion of high-pres­sure cells in each hemi­sphere. There are also 60 de­tailed charts of the most com­monly sailed ocean routes. And the book has been re­for­mat­ted to in­tro­duce monthly wind­grams for those routes that sum­ma­rize the in­for­ma­tion in each wind rose along the way.

While Lady Luck of­ten de­ter­mines if you’ll be in the right place at the right time,

Cor­nell’s Ocean At­las can help you avoid be­ing in the wrong place in wrong sea­son — the goal of ev­ery nav­i­ga­tor.

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