After the thousand-year-old dragon ---- Dragon Master who had just been sent lost from the dragon's lair rising from the bottom of the sea went through the last journey of his life, Luffy's promise to little Lori Abyss was successfully completed, and there was no reason for the Straw Hat Pirates to continue wasting time in the East China Sea, and after saying goodbye to Ablis and the residents of Gunkan Island, they immediately embarked on a new journey---- great voyage! （Grand Line）

The only thing left to succeed in setting foot on the Great Voyage is Mount Liworth (aka Upside Down Mountain!). This last hurdle is the test of this undefended natural moat, which is the most combat-ready captain on the ship......

No! It should be said that this natural pass tests the ability of a pirate ship to perceive the currents of a navigator who is more important than the captain most of the time---- position!

If you can let the pirate ship you control take advantage of the strongest thrust current, you will be able to sail smoothly along the canal to the entrance of the great shipping route---- Twin Capes, and start your own adventure.

But if the navigator makes a mistake in judgment and fails to make the right choice in the first place, and allows the ship to be swept away by other currents, then there is only one way to go, driven by the currents and smashed to pieces on the Red Earth Continent, unless there is the ability to eat the Flying Bird Devil Fruit of the animal or the possibility of escaping with oil from the high-level navy who is skilled in the moon step and has excellent physical strength, the others can leave at most a time to write a suicide note.

As a navigator on board the Son of the Plane, Nami's instincts and judgment are world-class, and despite the lack of intelligence that resulted in a little time wasted, Nami still made the right choice at the last minute, allowing the Golden Merry to ride the mountain current through the canal all the way to the summit of the Red Earth Continent.

With the biting sea breeze and the cold sea fog coming all the time, Wu Liang and his party, who were still dressed in short clothes, sneezed one after another, and no one was interested in continuing to spend time outside the cabin with Luffy's group of leather monkeys who beat the world in a set of clothes all year round, and a group of six people quickly got into the front cabin to change winter clothes, and by the way, in order to wait for the huge roadblock that was about to be encountered on the route in a while---- Island Whale Rab was ready to slow down the Merry in advance, at least he had to keep the goat's head on the bow of the ship and hit the horns. This is Luffy's captain's special seat!

If you want to stop the Golden Merry, which is fully loaded with nearly 100 tons, in the impact of high-speed currents, there is no other way than to use the bow gun located at the front of the forward cabin and separated by Wu Liang with a double layer of wooden planks, but if you want to use the bow gun to slow down, you also need to pay attention to the timing of the cannon to avoid the black powder filled in the gun chamber being wet by the splashed seawater, so you can't reload it too early, and you have to wait until the Mei Li climbs to the top of the mountain and starts to descend to fill the gun chamber with gunpowder and projectiles.

In the original book, although only one shot and the sacrifice of a bow made the Merry completely stop, Wu Liang did not dare to guarantee whether it would work at the moment, and for the sake of insurance, he still had to be prepared to fire continuously in a short period of time.

Taking advantage of the time when the ship was climbing, Wu Liang, who only had time to put a thick windbreaker on his body, prepared ten standard propellant barrels that had been weighed near the bow gun, and also prepared three water-soaked wiping gun rods at the front to quickly clean the gun chamber after the run, and use the water on it to help the gun body complete a certain degree of cooling process......!

Preparation can be done by one person, but if you want to play with the bow 24-pounder naval gun, which weighs two and a half tons together with the gun mount, and also fire continuously in the shortest possible time, it is not a task that can be completed by one person, and at least three people need to wait for one gun to ensure the maximum rate of fire.

Called Sakura Reiko and Poison Island Tsuruko into the small partition in the front cabin、(Space is limited, you can fit up to three people!) He spent the last bit of time teaching the two of them how to clean the chamber and the general process of firing the cannon with a wipe rod after firing, while Wu Liang was personally responsible for the loading of the propellant and projectile.

Of course, squeezing three adults and a cannon into such a small cabin will inevitably be more crowded, and Wu Liang did not forget to take the opportunity to dip some cheap on hand in the process of teaching, making Sakura and Poison Island giggle, and taking the lead in making fun Wu Liang was finally hit by the evil fire he made but had nowhere to vent, so he had to put his energy on the cannon in front of him.

The projectile shattered into powder had no way to attach to the mind at all, and Wu Liang didn't plan to kill the island whale Rab because he was in the way, so he didn't do anything to feed the ten shells that were about to be launched, but took out all the explosives from them and turned them into hollow soup balls, so that they wouldn't explode at all after they landed, and they could only rely on the impact force to create damage. Luffy won't be provoked until he deliberately dies.

Although the calculations are seamless, there will always be a variety of unexpected variables, just as the Golden Merry successfully landed on the top of the Red Earth Continent and immediately began to fall, the artillery crew composed of Wu Liang, Sakura Reiko, and Poison Island Tsuneko began a rapid fire artillery bombardment with a very high frequency, and the hollow projectiles fell aimlessly into the lagoon in the harbor of the Twin Capes below, some hit the huge black shadow blocking the exit of the main channel below the mountain, and some crossed the black shadow and fell directly on the surface of the lagoon and smashed the water splash.

I don't know if it was disturbed by the cannonball that fell into the lake, or if this unlucky guy was washed by the incomparably strong current from other oceans like the Golden Merry, but as the smoke from the eighth cannonball was released from the cannon chamber, a giant king squid about 100 meters long suddenly appeared in the sea water in front of the Merry, stretched out two long tentacles and swept towards the hull of the ship of its length on the sea.

Usopp and Nami, who had just experienced ecstasy, let out screams that could be heard clearly even from several layers of ship's planks, and in order to enjoy a moment of peace for his ears, Wu Liang did not hesitate to fire the ninth shot, and this time using live ammunition that did not pull out the explosives.

The round cannonball had already stuck to the body of the king squid who dared to stretch out its claws at the Merry in the second second after it was discharged, and in addition to blowing up a huge wound that was nearly a meter long and wide, a huge amount of jet-black ink was scattered throughout the sea.

Some coastal friends should know that squid ink is an irresistible delicacy in the mouths of some gluttons with unique tastes, and this kind of sweet and salty taste of sea water is also what whales like to eat, and Island Whale Rab is no exception.......

"Help! Merry is going to be eaten by whales......! Usopp's scream rose three octaves again, and even the long nose, which had just recovered from his injury, fluctuated greatly with the scream and shook into instant noodles!

"Whew!"