These are the principal vital statistics of the Nancy Blackett.
- Length on deck: 28ft 6in (8.68m)
- Beam: 8ft 1in (2.46m)
- Draft: 4ft 6in (1.53m)
- Gross (Thames) tonnage: 6.80
- Registered tonnage: 4.86
- Official Number: 162814
- (Goblin’s Official Number: 16856 – from ‘We Didn’t Mean to Go to Sea’ by Arthur Ransome)