go west of that place on the sea chart and then you will see the harrowing island
go to zeldauniverse.com and click on " Phantom Hourglass"
You go to the end of the temple of the ocean king and kill 9 phantoms with the sword (By hitting them in their backs) and beat the final bosses 3 forms.
go to www.zedladungeon.net
You go to osha and he fuses the hourglass with the blade
To her sister the "Mermaid"!
to get a cannon you have to go to cannon island
*Caution- Major plot spoilers are included*The Phantom Hourglass is a magical artifact that allows you to go through the Temple of the Ocean Kingwithout losing any life. However, the Phantom Hourglass, as the name states, is an hourglass, and therefore, gives you a timed speedrun of the Temple of the Ocean King. There are 50:00 Minutes maximum that you can collect by finding the Sand of Hours. you will go to the heart of the temple at the end of the game to defeat Bellum, the Evil Phantom. Using the Hourglass, you will get the Phantom Sword.
go to the temple of the ocean king and draw a triforce instead of an hourglass and the get thenortheastern seachart
go on to ign.com then click on Zelda walkthrough
go find golden frogs
you get the bombchus when you go through the temple on the gorons isle
square circle triangle