I'm planning on sailing from San Diego to Ensenada MX at the end of June. I've heard people mention something called a "TIP" when taking their boat to Mexico for the first time. I bought my Ericson 33-3 last October and don't know if it has been to Mexico with the prior owner, and I can't ask him because he unfortunately passed away. Can anyone shed some light on what the "TIP" is and what I need to be aware of?