Learning

Introduction to OpenCPN App

This text is the third in a series of five on electronic navigation applications. It shows how to use the OpenCPN application to perform eight essential navigation tasks: The other texts cover the Navionics (Boating), Savvy Navvy, C-MAP and SEAIQ applications respectively. Before reading this text, it’s a good idea...

Introduction to the Savvy Navvy App

This text is the fourth of five on electronic navigation applications. It covers the use of the Savvy Navvy application to perform the eight essential navigation tasks: The other texts cover the Navionics (Boating), C-MAP, OpenCPN and SEAIQ applications respectively. This text assumes that the application is installed on a...

Introduction to Electronic Navigation Apps

This text focuses on electronic navigation applications for small craft. These electronic applications are used to display electronic charts. For concrete examples, this site includes five introductions to different applications: Navionics (Boating), OpenCPN, C-MAP, Savvy Navvy and SEAiq. Below, I detail the elements common to navigation applications generally found on...

Introduction to the C-MAP application

This is the second of five articles on the use of electronic navigation applications. It focuses on the C-MAP application. The other texts cover the use of OpenCPN, Savy Navy, Navionics and SEAIQ. It focuses mainly on installations on tablets or cellular devices that are not connected to a sailboat’s...

Introduction to electronic charts

This text is intended as an introduction to electronic charts. It is not an introduction to the use of chartplotters or to the use of applications showing electronic charts. It is an introduction to charts. It covers how they are designed, their types and formats. This knowledge helps to understand...

Introduction to Navionics (Boating)

This text is the first in a series of five on electronic navigation applications. It shows you how to perform the most important navigation tasks, i.e. how to: This first text covers the Navionics (Boating) application. The other texts cover OpenCPN, Savyy Navy, C-MAP and SEAIQ respectively. Prior to reading...

Contessa 32 under spinnaker

Sailboat familiarisation (part 2)

This series of texts describes how to carry out a familiarisation inspection of a sailboat. The first text described how to think about inspecting three of the nine fundamental components of a sailboat: the hull, the engine and the rigging. The second text, this one, illustrates how I familiarised myself...

Sailboat familiarization (Part 1)

You arrive in the Caribbean and finally reach the marina where you’ve hired a yacht. Once the administrative formalities have been completed, you are taken to the docks and then onto the yacht. The first few minutes are exhilarating! You chat to your friends and dream about the week ahead!...

Purchase: two videos on bluewater sailboats

I came across two videos on the Sailing Zingaro channel that describe relatively well the desirable characteristics of an offshore sailboat. The comments seem well-founded enough for me to say that these are two good reference videos. In particular, the impact of the hull shape on the boat’s maneuverability, the...

Spherical trigonometry and navigation

Setting the scene A ship leaves New York, USA, bound for Brest, France. Assuming it takes the shortest route, what will be its departure course? If it is sailing at 15 knots, how long will it take to reach Brest? The coordinates of the two ports are known (below). City...