The Royal Institute of Navigation, Small Craft Group has published a 100 page 'booklet' called Electronic Navigation Systems - Guidance for safe use on leisure vessels. 

It has advice and guidance on:

• safe use of electronic navigation and associated systems on leisure vessels
• “keys to safety” in many operational situations
• advantages and drawbacks of different systems and approaches

It's is available as a free download from their website.

Why not update your knowledge on this important subject.