Maybe it's just me, but I've never been able to land or take off successfully offshore by looking out at the horizon. I've landed on just about everything that moves over the last 20 years - seismic boats, drilling tenders, barges, drillling rigs, tankers, & what have you, many of them pitching a lot, plus a few tens of thousands of platforms, & the only way I've been able to do it is to concentrate on the landing area, & make that look like its stationary. From the altitude required on many of these, sometimes > 200 ft MSL, I just can't get enough visual cues. I don't know any other pilots who look at the horizon. I look close in, & I can keep my movement relative to the landing area to a minimum. If you try to look at the horizon while landing on a tanker at night, I don't want to be close enough to be hit by the shrapnel.