What should I pay attention to when traveling by boat?

Attention can be directly followed by a noun, pronoun or gerund, but it is worth noting that to is a preposition here, not an infinitive, and it is the same as look.

pay attention to

use

Pay attention to doing sth.

Pay attention to sth.

Because to is a preposition here.

take for example

Pay attention to national affairs.

Concerned about national affairs

Please take care of your baby.

Please take good care of your children.