Tranter's Corrections
Tranter's corrections make adjustments for fitness and fatigue. Fitness is determined by the time it takes to climb 1000 feet over a distance of ½ mile (800 m). Additional adjustments for poor terrain or conditions can be estimated by dropping one or more fitness levels.
| Individual fitness in minutes | Time taken in hours estimated using Naismith's rule | |||||||||||||||
| 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | |
| 15 (very fit) | 1 | 1.5 | 2 | 2.75 | 3.5 | 4.5 | 5.5 | 6.75 | 7.75 | 10 | 12.5 | 14.5 | 17 | 19.5 | 22 | 24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 20 | 1.25 | 2.25 | 3.25 | 4.5 | 5.5 | 6.5 | 7.75 | 8.75 | 10 | 12.5 | 15 | 17.5 | 20 | 23 | ||
| 25 | 1.5 | 3 | 4.25 | 5.5 | 7 | 8.5 | 10 | 11.5 | 13.25 | 15 | 17.5 | |||||
| 30 | 2 | 3.5 | 5 | 6.75 | 8.5 | 10.5 | 12.5 | 14.5 | ||||||||
| 40 | 2.75 | 4.25 | 5.75 | 7.5 | 9.5 | 11.5 | Too much to be attempted | |||||||||
| 50 (unfit) | 3.25 | 4.75 | 6.5 | 8.5 | ||||||||||||
For example, if Naismith's rule estimates a journey time of 9 hours and your fitness level is 25, you should allow 11.5 hours.
Read more about this topic: Naismith's Rule