You guys sound like total greenhorns ... it would be advisable to spend as much time as poss aboard ... maybe cruising your local area ( south UK ? ) before heading off into the big blue ...
Regarding your question on charts ...
for sure you ought to muster a couple of laptops ( 1 in use & 1 spare ready ) ... install OpenCPN
& beg/steal/borrow all the electronic charts you can lay your hands on ( many are available as free downloads using Emule, Limewire or other PtoP utilities ) ...
also beg/steal/borrow or buy paper charts relevant to your planned route plus charts covering areas you might need if you are forced to alter your sail plan ...
take (at least ) 2 handheld GPS
... ensure they interact with your laptops as well as operate stand-alone
by now you ought to be getting the message of "the rule
of two" ... ie carry at least one spare of everything ...
Regarding your question of a "mast light" .... your boat must be correctly lit ( navigation
lights ) ...
You need to address the question of power for the boat ... a combination of wind/solar is regarded as the norm with ready power available via the boat's main engine/alternator ... your boat does have a motor
Batteries ... the more & bigger so much the better but understandably space on a small boat is always at a premium ... install your batteries securely ( they are heavy items & if not securely strapped in place will fly about unpleasantly in rough seas or in a knockdown/rollover scenario ) ... also carry battery
servicing tackle ( distilled water
... hydrometer ... multimeter ... considered extreme but I also carry H2So4 in case I lose battery
acid in an upside-down event ) .... as an extra backup I carry a jumpstart powerpack thing ...
In an earlier post you enquired about water
... someone else advised a hand operated watermaker
... good equipment
... keep it handy too if you have to take to the liferaft
.... you do intend to carry a liferaft
... right ?
Also ensure you carry some means of catching rainwater ...
is a must-have item ... make sure it is properly registered ... remember the "rule of two" ? ... 2 EPIRBS are better than one ... I carry a PLB & a SPOT as backup ...
Carry spare sails
& have the means & materials on board to make repairs
..... carry as much dried & canned food
as you have space to stow ... remove labels from cans & write on what the contents are in permanent marker .... also coat the cans with a light film of vaseline before stowing .... dried foods should be removed from their packaging & contained in waterproof canisters ... drop a few bay leaves in each canister to keep weevils at bay ... take fishing gear
... at least trail a decent hook with an attractive lure on it whilst underway ... having said that, don't be disappointed if you don't catch anything - open a can instead ....
Remember the "rule of two" ? .... carry spare bedding/sleeping bags .... keep them dry along with spare clothes etc by double wrapping in stout black sacks or, better still, in vacuum storage
Your route ... consider going via Azores
then on to the Caribbean
where you will reach a good choice of stop offs before Jamaica ...
Don't forget the sun cream, sun hats (plural) & a comprehensive first aid kit ...
Flares .... handheld - starshots - parachute types ... take some of each along with coloured smoke indicators & water dye indicators .... strobe lights (plural) ...
Comms .... the basic minimum is Marine VHF
... with DSC
is preferable ... also carry a handheld VHF
as backup & to take into liferaft if things turn pearshaped .... if you can afford it then a SSB
rig is well worth the investment .... also if you can afford it a Sat Phone
will keep you in contact with loved ones & SMS messages via satfone are quite cheap
... the SPOT gizmo also sends out a pre-programmed text email
with a hyperlink to Google
Maps to a list of email
.... fill your main fuel tank
.... ( wise to filter it on the way into the tank ) .... then carry spare fuel
in jerrycans .....
fuel .... ensure you carry enough & if using propane
, be aware that your UK cylinders might not be refillable in other countries ... if using methyl/alcohol be aware that this may not be available in other countries .... hell - once you get to Jamaica you will be able to burn RUM
in yr coocking stove ...
.... avoid the high-fashion high-price yachtie clobber ... you cant beat a good rugged set of "slickers" & a sou'wester ...
Harnesses (plural) .... good quality rigger's or scaffolder's harnesses will do the job & be way cheaper than yachtie ones ..... bolt on a stout eye-shackle in the cockpit to clip onto .... run a jackline secured bow to stern down each side of the deck
to clip onto if going forward ... I recently switched from rope jacklines
to flat nylon webbing ( no rolling underfoot ) ...
That's the extent of my input ..... unless I think of something else ...
Bon Voyage .... as they say in Froggish