In this fanfiction, it could also be that Naruto is on a mission related to the battleship Yamato. There could be an evil force that wants to use the power of the Yamato for its own malicious purposes. Naruto has to team up with the ship's crew, which includes some characters with unique abilities of their own. They all work together, with Naruto leading the charge against the enemy using his Nine - Tails chakra and his vast array of ninja skills.
One possible plot could be that Naruto is on a difficult mission and Yamato is assigned to be his partner. They start off with some misunderstandings due to their different personalities. Yamato is more reserved while Naruto is brash. But as the mission progresses, Naruto starts to learn from Yamato's calm and calculated approach and Yamato begins to see Naruto's determination and heart. In the end, they form a strong bond and become great friends who can rely on each other in future battles.
Naruto might be in awe of the battleship Yamato at first. He could use his chakra to enhance the ship's speed or power in some way. For example, he could transfer some of his chakra to the engines to make it move faster.
Well, in the fanfiction, since Naruto is sick, Yamato might recall all the times Naruto has been strong and determined. He could be determined to see that strength return. Yamato might seek out special herbs or medical ninjutsu knowledge to cure Naruto. And during Naruto's sickness, they could have deep conversations about Naruto's dreams and fears, strengthening their bond further.
One idea could be a crossover with Star Trek. The Yamato crew could encounter the USS Enterprise and have to work together to face a common enemy, like a powerful alien race that is threatening both their galaxies. They might have to learn from each other's technology and ways of handling situations.
Well, if the Battleship Yamato time - travels, it might end up in a modern naval battle. With its huge guns, it could initially cause a lot of chaos. But modern ships have advanced radar and missiles. So it would probably be quickly outmatched.
One possible plot could be that Naruto discovers an ancient battleship hidden deep in a forgotten part of the Land of Fire. The battleship is filled with powerful weapons and technology from a bygone era. Naruto decides to restore it with the help of his friends. As they do so, they attract the attention of a powerful enemy who wants the battleship for themselves. Naruto then has to use the battleship to defend his village and his newfound treasure from this enemy.
One interesting storyline could be a crossover where the RWBY characters find themselves on the Battleship Yamato. Maybe they have to work together to face a common enemy that threatens both their worlds. For example, a Grimm invasion on the Yamato's world.
In the fanfiction, old man Naruto might be facing some sort of threat to the village again. He calls on Yamato, his old comrade, to help him. Together, they plan strategies and use their combined skills, with Naruto's nine - tails power (albeit in a more controlled and aged - related way) and Yamato's wood - style jutsu to protect the village one more time.
Perhaps a fan fiction where the Yamato is suddenly invaded by a group of shape - shifting aliens. These aliens can take on the form of the crew members, causing chaos and paranoia on the ship as no one knows who is real and who is an impostor. The remaining real crew has to find a way to identify and defeat these aliens.