Nixon was not the one, it was WJ Clinton that also invited them aboard our boomers and fast attack subs. Nevertheless, that is past history. There is always basic old charting and even the old compass. Not all bad. Just had a friend that was sailing from Port Aransas, Texas to Isla Mujeres, when his whole system went down about 200 nm out. He actually made it using the compass and some good chart work. The Chinese had nothing to do with it.