
Arthur D
Significant upgrade to the original great reference. Well worth the cost, whether you are a professional mariner or not. After initial review, my only real criticism is the lack of a master symbol definition summary table for the equations shown in the stability chapter. Some sub-sections have symbol definitions and others don't.
22 people found this review helpful

GREY ASBORNE 5986
I give it a 5 star. Looking forward to be better useful tools and learning book. This all in one Book. It has all basic needs and information in maritime learning. I suggest to have a group chat all around the world for this to make it better and better from time to time so that they can suggest also for better viewing and better user interface of this app. So seafarers all around the world can easily adopt all the knowledge and safety to be a professional seafarer. It must have a facebook page.
22 people found this review helpful
Ozgur Dogan GUNES
April 4, 2022
great suggestions! thank you!

Shinji Aeseki (Villainous Hero)
The App is very usefull and the contents are great. But the colregs full version got summarized half way. Then the way points for the great circle calculator are a bit innacurate. So please fix it. Thanks! Ps. I use this to double check my calculation and in class. so helpfull but also made me confused due to some errors...
19 people found this review helpful
Ozgur Dogan GUNES
March 16, 2023
Dear Shinji Aeseki,
Seabook aims to remain as a handbook to reach knowledge easily. Many thanks for the feedback! The GC calculation is based on generic indication.