[CarribeanThunder]

Here's mine:
Ok you start the boss battle. You will do a cutscene with the same Navy Guards from the BP Boss Battle cutscene, but they will argue about something else, and the place will be different.

After this cutscene, you will board the Black Pearl again, and you will be greeted by Navy Dragoons ( Lv29-39, random levels ) and EITC Assassins or Mercenaries, random each time
( Lv29-39, random levels ).

Defeat them, and someone must take the wheel.
Man the cannons.

You will be greeted by a fleet of Marauders, 1 after the other ( Sink 1, and the 2nd will appear ).
You will be able to move around while battling the Marauders.
All Marauders at Lv25.

After the battle, similar to the BP Boss Battle, you must break down a Fort.
This Fort uses Firebrand.
The fort will be like this:

------------------------------------------------|-------------|---------------------------------------------------------------------------------------------------------------------------|-------------|--------------------------------------------------------
------------------------------------------------|___________|--------------------------------------------------------
>>>>>>>>>>Bridge>>>>>>>>>>>>>>>>>Fort<<<<<<<<<<<<< <<<<Bridge<<<<<<<<<<

Break it down:-----------

_____________________\_/____________________|-------------|________________________\_/______________
-------------------------X-----------------------|-------------|-----------------------------X-----------------------
------------------------/--\----------------------|___________|----------------------------/--\----------------------
>>>>>>>>>>Bridge>>>>>>>>>>>>>>>>>Fort<<<<<<<<<<<<< <<<<Bridge<<<<<<<<<<

Then continue. You have 2 ways to go:

------------------------------------------------|-------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------|--------------------------------------------------------
------------------------------------------------|________|--------------------------------------------------------
>>>>>>>>>>Bridge>>>>>>>>>>>>>>>>>Fort<<<<<<<<<<<<< <<<<Bridge<<<<<<<<<<
-------------------^---------------------------------OR-----------------------------------^------------------------

Which ever way you go, you will be greeted by an Ogre. Sink it.
You can always go the other way and sink the other Ogre.
Both are Lv31.

When you reach the second Fort when you go left, the Forts will be made of steel, none of the ammos are effective against the Forts. But, there IS a weakness.
This Fort uses Thunderbolt.
This Fort will be like this:
----Health Bar-------------------------------------------------------------------------------------Health Bar----
---|=======|------------------------------------------------------------------------------------|=======|---
---------|=|---------------------------------------------------------------------------------------------|=|---------
---------|=|---------------------------------------------------------------------------------------------|=|---------
---------|=|---------------------------------------------------------------------------------------------|=|---------
Fort--Lightning Rod---------------------------------Bridge------------------------------Lightning Rod--Fort

The only way to break this Fort down, is by shooting Thunderbolts at the Lightning Rods:
-----Damaged By Thunderbolts------------------------------------------Damaged By Thunderbolts------
----Health Bar-------------------------------------------------------------------------------------Health Bar----
---|=====---|------------------------------------------------------------------------------------|=====---|---
---------|=|---------------------------------------------------------------------------------------------|=|---------
---------|=|---------------------------------------------------------------------------------------------|=|---------
---------|=|---------------------------------------------------------------------------------------------|=|---------
Fort--Lightning Rod---------------------------------Bridge------------------------------Lightning Rod--Fort

When you see 1 Lightning Rod burst in flames, throw an Explosive Shot at it to destroy it. Do this to both, and the Bridge will fall.

When you pass this Fort, you will be at the Final Fort.

If you went to the right of the First Fort, you will be at a Fort with flames all over.
This Fort uses Firebrand.
It looks the same as the Left Second Fort.

To break this one down, you must put out the flames. To do this, shoot the water near the Forts ( Round Shots and Siege Charges into the water would be most effective ).
All cannons are ineffective while the Fort has the flames.

Once the flames are out, shoot the Fort with any ammo and the fort's bridge will fall.
Back to the Final Fort.

This Fort has 3 parts ( like the first Fort in the BP Boss Battle ) instead of 2 or 1. Do as you would to any other Fort.
This Fort uses Fury.

Once you leave the Harbor, you will enter a cutscene similar to the BP Boss Battle's Goliath Battle Intro. You will be up against the EITC Bombarder.
This Ship uses all explosives.
Use Take Cover as soon as the cutscene is over, as the Bombarder starts firing at this moment.
The Bombarder's upper deck Explosives take as long a charging time that a Broadside would take.
This ship is a War Frigate, the size of the Goliath.
This ship will be Lv50.
He doesn't do much as long as you don't let a full round of explosives hit you.

When you sink The Bombarder, you will be in the same position as when you sink The Goliath.

When you arrive back on land, talk to Elizabeth Swann. She will award you with a Nova Frigate, an ultra rare, no-where-else-to-buy Frigate.

Stats:
Hull: 17500
Sails: 5000
Broadsides: 16
On-Deck Cannons: 15
Cargo: 16
Crew: 15