Business commerical boat

You would enter the boat as a business asset using the Tools, Machinery, Equipment, Furniture asset description:

Then, choose the General purpose tools, machinery and equipment category:

You will have a choice to expense the cost of the boat using section 179 depreciation. The expense amount will be limited by the business income. You can also choose 80% (for 2023) bonus depreciation that is not limited by business income. You can also choose seven year accelerated depreciation by not electing section 179 or bonus depreciation. Any unused section 179 depreciation gets carried over to the next year. The 20% of cost not allowed for bonus depreciation will be depreciated using accelerated depreciation over seven years.

The costs can be entered as miscellaneous business expenses.