Song: Jammin'
Artist: Bob Marley & The Wailers
Album: Exodus (1977)
Bassist: Aston "Familyman" Barrett

This is a cool song and very easy to play, not to mention easy to 
improv. Most of the tabs i have seen, however, are an octave too 
low. This is how its meant to sound.

Main Riff
Play during verses, choruses, actually, most of the time. It 
sounds good with any variation
on this riff, to a degree.

G|———————————————|———————————————|
D|———————————————|———————————————|
A|—————————7—7—77|9—9—9—9—8—8—8—8|
E|7—7—7—77———————|—————9—————8———|


Riff 2
Play between verses, ie. during "Aint no rules, aint no vow", 
"No bullet can stop us now" etc.

G|—————————————|———————————————|—————————————|———————————————|
D|—————————————|———————————————|—————————————|———————————————|
A|——577—5———577|9—9—9—9—8—8—8—8|——577—5———577|9—9—9—9—8—8—8—8|
E|7.—————77————|—————9—————8———|77—————77————|—————9—————8———|


Riff 3
Play during "Holy mount zion"

G|—————————————————|—————————————————|————————|————————|
D|—————————————————|—————————————————|————————|————————|
A|—————————7—7—7—77|—————————7—7—7—77|————————|————————|
E|7—7—7—77—————————|7—7—7—77—————————|—7——————|—7——————|

So the song goes:
Riff 1 x4
Riff 2 x1
Riff 1 x2
Riff 2 x1
Riff 1 x2
Riff 3 x1
Riff 1 x2 (Play a variation on 1st and 3rd bars of this riff)
Riff 1 x1
Riff 2 x2
Riff 1 x3
Riff 2 x1
Riff 1 x2 (On last bar of the song, improv again)

There it is. Its a really easy song, and like i say, you can improv 
most of it anyway, so this tab is really only a guide.Enjoy.