Why a mapped key in vim does not work in netrw?

Question

While exploring with netrw, you can hit t to open the directory in a new tab.

But if I do :map v t, then v will open the directory in a split window, not a tab.

Same if I do :map v :normal t<CR>

Why does this happen? How can I accomplish such a map?

Answer 1

Duh.

netrw already has v mapped to split to a new window.

If I map K, this works.