It doesn't look like boomerangs can be caught while on water.
Steps to Reproduce
1- Obtain a boomerang, and a boat (I was using an armored boat with a boat lantern and ironwind at the time). 2- Throw the boomerang at a target. 3- Try to catch it on its way back. 4- Try this a few more times to make sure it's not just you having horrible boomerang skills. Expected: Boomerang caught. Actual: Boomerang hits and damages the boat.
1- Obtain a boomerang, and a boat (I was using an armored boat with a boat lantern and ironwind at the time). 2- Throw the boomerang at a target. 3- Try to catch it on its way back. 4- Try this a few more times to make sure it's not just you having horrible boomerang skills. Expected: Boomerang caught. Actual: Boomerang hits and damages the boat.