Aqaaid

Reciting Durood before giving Azaan

Q: What is the basis in shariah of reciting Durood before giving the azaan? Also, when carrying out a good deed, eg, performing umrah, nafl hajj, reciting the Quraan etc, if one makes intention to pass the reward onto deceased relatives or our Prophet (Sallallahu Alayhi Wasallam), does the person himself get reward in full too?

Baseless beliefs

Q: My father has the practise that whenever he goes to the beach, he faces the ocean and says: "Assalamu Alaikum O Great Man of the Ocean!" He commands us to do so as well mentioning that their lives a Wali of Allah Ta'ala in the ocean who had eaten/drunk something that had granted him eternal life. And that Allah Ta'ala had hidden him in the ocean so that people do not pester him. These are the words of my father. Is there any substance to this and the saying "Assalamu Alaikum O Great Man of the Ocean!"?