Limitations: The channel crossing might be rough; no pregnant girl, no-one with neck or again injuries, and no small children beneath 5 are permitted. Entire encounter snorkels are usually not permitted. The beach locations are rough and rocky, but included in pure white sand coveted by developers on Waikiki Seashore, https://snorkeling-niihau-island44443.thechapblog.com/33953743/the-ultimate-guide-to-niihau-boat-tour