to give you an example: https://www.theguardian.com/world/2016/jun/08/british-climber-aiden-webb-missing-vietnam-jungle-calling-help https://www.theguardian.com

to give you an example: https://www.theguardian.com/world/2016/jun/08/british-climber-aiden-webb-missing-vietnam-jungle-calling-help https://www.theguardian.com/world/2016/jun/08/british-climbe... and that is not the ocean, and yes he died