Bru
Well-Known Member
Very unfortunate as all small craft should carry paper charts as unlike the big boys they will not have have duplicate navigational and electrical systems.
You might not have but I have!
Primary navigation - chart plotter and external GPS antenna running Navionics
Secondary navigation - laptop (both Navionics and Admiralty available) and GPS via AIS receiver
Both primary and secondary can get a GPS fix from either the external GPS antenna or the AIS receiver
The secondary can also get a GPS fix from a smartphone etc.
Third backup is a tablet with built in GPS and again both Navionics and Admiralty available
Fourth backup is a smartphone otherwise identicial to the tablet
Both tablet and smartphone can be recharged from external "bricks" giving up to 72 hours continuous use (and much longer if used sparingly) even if the main boat electrics fail completely
Passage planning is done on the laptop using a large screen display (and comparing both chart sets btw)
The Navionics charts are regularly updated, much more regularly than (in all honesty) paper charts would be
So I really have no need whatsoever for paper charts
And yet ... I do still carry them! However, the Admiarlty folios are costly, have to be replaced as a complete set and, if cruising any distance, you need a LOT of them! I carry the relevant Imray 'C' series charts which, other than for the Thames Estuary*, have enough detail plus harbour plans to get me into a safe haven in the extrmely unlikely event of total loss of all means of electronic navigation
* As the Thames Estuary is home waters, I already have a complete set of older but still just about adequate folio charts which I do from time to time update with critical updates. They are probably getting past their use by date now and due for replacement with an Imray set (because the Imray folio charts can be replaced individually when superceded
And the 'C' series charts are much better for passage planning on the odd occasions I want to go old school (usually just to keep my hand in but once in a while I want to manually check tidal calculations etc.) as they cover a much larger area than the individual folio charts