Here's the riff at the beginning before the verse riff,
E|------------------|
B|------------0h1h0-|
G|---7-5-4-0h2------|
D|--0-0-0-0---------| play this 4 times
A|------------------|
E|------------------|

Here's the verse riff for all the verses,
  D         Cadd9
E|-2-0-2-3---3-|
B|-3-3-3-3---3-|
G|-2-2-2-2---0-|
D|-0-0-0-0---2-|
A|-----------3-|
E|-------------|

[Verse 1] this is the format for all the verses
D          Cadd9
Everybody, listen to me
D              Cadd9
And return me, my ship
D                 Cadd9
I'm your captain, I'm your captain
D                    Cadd9
Although I'm feeling, mighty sick

[Verse 2]
I've been lost now, days uncounted
And it's been months since, I've seen home
Can you hear me, can you hear me
Or am I, all alone

[Verse 3]
If you return me, to my home port
I will kiss you, mother earth
Take me back now, take me back now
To the port, of my birth

[Bridge]
Dm            Bb           Dm            Bb
Am i in my cabin dreaming, or are you really scheming
Dm         Bb              F     A     A
To take my ship away from me
Dm             Bb           Dm               Bb
You'd better think about it, I just can't live without it
Dm              Bb                      F    A    A
So please don't take my ship away from me

Go back to playing the verse riff a few times, then into verses 4 and 5

[Verse 4]
I can feel the hand, of a stranger
And it's tightening, round my throat
Heaven help me, heaven help me
Take this stranger, from my boat

[Verse 5]
I'm your captain, I'm your captain
Although i'm feeling, mighty sick
Everybody, listen to me
And return me, my ship

[Verse 6]
I'm your captain, yea yea yea yea
I'm your captain, yea yea yea yea
I'm your captain, yea yea yea yea
I'm your captain, yea yea yea yea

then play the outro till the end. the outro is very slow and not at all like the verses.


[Outro]
D                        C
I'm getting closer to my home (repeat till end)