A credit-card sized planning aid-memoir containing:
- 50/90 rule
- Rule of 3rds
- Rule of 12ths
- Rule of 7ths
- Distance conversions
- Distance scales (km, miles, nm)
 
Perfect for use on planning sessions, on the water re-plans and as gifts for your paddling buddies.
 
Can be added to any Crib Card Set for just £1.50 - Go to the crib card page, select add First Mate/Nav Card on the options menu.
 
This product contains: 1x double sided card.