The best replacement for snorkel is scuba.

The best alternatives to snorkel are rated as following:
★★★★★  scuba
★★★★  cold air intake
★★★  york
★★  snorkel
★★  pepper
★★  scuba mask
★  semi dry snorkel
★  air intake
★  semi dry
★  dive
★  airtec
★  bilko
★  mantec
  wet snorkel
  parker 51
  dry snorkel
  aev snorkel
  regular snorkel
  tjm
  open element
  snuba
  safari
  safari snorkel

Your alternative for snorkel is not listed? Suggest!
Speaking about snorkel, one probably shouldn't forget about going under water.

Other search terms related to snorkel and their ratings are:
★★★★★ going under water
You have in mind a companion for snorkel and it is not yet here? Propose!



Google Trends

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snorkel
scuba
cold air intake