While researching "grog songs" I ran across this one in my reprint of John Ashton's REAL SAILOR-SONGS which shares some lines with one of Charles Dibdin's grog songs "The Sailor's Sheet Anchor:

THE MARINERS' COMPASS

(Anon., Real Sailor-Songs, p. 255
Tune: I'm using some off-spring of the "Black Velvet Band")

Sam Spritsail's a lad you'd delight in,
For friendship, he's ever agog,
Loves his King, loves his wench, loves fighting,
And he loves, to be sure he does, grog!
Says Sam, says he, life's all a notion,
And wants from the spirit a jog,
The world is a wide troubled ocean,
And our rudder and compass is grog!

Chorus:

For grog is our larboard and starboard,
Our mainsail, our mizen, our log;
At sea or at shore, or when harbour'd,
The Mariners' Compass is grog!

Let but grog take its charge of the helm,
We perceive not the dangers of sea,
Or if billows the vessel o'erwhelm,
Still grog is the pilot for me;
Since grog saves the trouble of thinking,
Then here's to each bold jolly dog,
For he that delights in good drinking,
Will toss off his full can of grog! (CHO)

Sam Spritsail, though grog he lov'd dearly,
And its praise he enraptur'd would sing,
Yet he fought for his country most cheerly,
Lov'd his sweetheart and honour'd his King;
For Sam's heart was splic'd to his Nancy's,
And his mind on the wench quite agog,
Yet sailors have comical fancies,
And dear as his Nance, he loves grog! (CHO)

"The Sailor's Sheet Anchor" has some similar lines in its first verse:

Smiling grog is the sailor's best hope, his sheet anchor,
His compass, his cable, his log,
That gives him a heart which life's care cannot canker;
Though dangers around him
Unite to confound him,
He braves them, and tips off his grog,
'Tis grog, only grog,
Is his rudder, his compass, his cable, his log,
The sailor's sheet anchor is grog!

Cheerily,
Charley Noble