Upgrade System

All Yield Items in Harbor Finance can be upgraded from Level 1 to Level 5, with each level offering enhanced performance and better yield or ROI potential.

The upgrade system introduces a long-term strategy where players decide whether to compound their boats or reinvest their $FISH rewards to accelerate growth.

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Key Upgrade Principles:

• Fixed upgrade cost: always based on the item's base price.

• Yield or ROI scaling:

  • Fisher: +2% yield per level

  • Boat: +5.5% yield per level

  • Platform: +10% ROI per level

• No Fuel required for upgrades.

• Upgrades affect future yields without resetting the current cycle.

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Mechanics:

• Max Level: 5

• Upgrade Cost: 10% of the item's base price, paid in $FISH

• Fuel Cost: None

• Progression:

  • Fisher: +2% yield per level

  • Boat: +5.5% yield per level

  • Platform: +10% ROI per level

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Upgrade Cost by Item:

Item	Base Price	Upgrade per Level	Max Upgrade Cost (Lv.5)
Fisher	250 $FISH	25 $FISH	100 $FISH
Boat	1,000 $FISH	100 $FISH	400 $FISH
Platform	2,500 $FISH	250 $FISH	1,000 $FISH

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Strategy Notes:

• Upgrade costs are fixed and based on the initial base price (they do not increase with higher levels).

• Upgrading is optional but highly recommended for players who want to maximize long-term compounding.

• Yield items can be repaired and then upgraded afterward without resetting deployment timers.

• No Fuel is consumed when upgrading.

• Upgrading impacts the next deployment or next repair cycle, not the current one.