Samudraullangna (crossing ocean) is considered to be Sin, becuase once you cross the ocean, you are going to come in contact with people who eat lot of Beef and pork. So in this way your consciousness will also get affected and thus you also incur sin. Now if you are planning to go and comeback, and FOR SOME RELIGIOUS REASON, then its perfectly OK,, coz you know when you comeback you are going to dip once in the Ganges to clear the consciousness. This is completely scientic and it is mentioned in Geeta to have a Saadhu sanga, which means to be with vegie people and also in an environment, where there is a controlled material desire and lust.
He he did I offend yu in anyway? I mean yuo sound a bit rude here. This is not good for healthy debate. Now, coming to the point, I have been across the globe and have CONSTANLY noticed the chnage in my CONSCIOUSNESS when I travelled in the west. Thats really phenomenal. There is more material here, there is more sin, and to be honest, my senses are controlled well in India than in any western nations. I can bring you some quotes from some scriptures. Let me know if this answer satisfies, then I can find a right source-with direct explanations.
Thats after the age of Kali started. There has been constant travel across the ocean after the age of Kali started. Thats not a new info anyways. All the so called relgions have sprouted in age of Kali, even with bogus name HINDU.
Thats true to certain level. However, the basic way of evalution by the west is totally flawed. They measure on the basis of material, temporory things. They always think, fullfilling basic need of senses is the only purpose of this life. They dont belive on next life, They say no soul only body. I mean there are many ways they try to prove themsleves superior. Superiority is measured interms of Dharma (i.e righteousness), austerity and sacrifice for the superme cause. Just like even after having a 50 times sophisticated army than Pandavas, kauravas had to see the face of defeat , reaosn DHARMA was on thier side. Krishna was on thier side...