
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
On the riverbank, there is a fort 30 meters high. In the river, there are two ships. The depression angles from the top of the fort to each of the ships are 45° and 30° respectively. Additionally, the lines from the base of the fort to each of the ships form a 30° angle. What is the distance between the two ships?

Present the answer in LaTex format: \boxed{Your answer}
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