Another suggestion:
Often I want to quickly jump to a certain time to check weather there. To do so, it is quite inefficient to first carefully grab the slider and move it to the desired time.
At the moment, when I want to jump to a certain time, I need to click or tap the very thin line directly underneath the slider. Since this line is so thin, this is quite difficult sometimes, in particular when being underway with a boat. Very often I tap into the map instead...
Suggestion: Instead of clicking/tapping this very thin line, let the user also tap into the region below the slider to set a desired time. See my screenshot where I tried to highlight hat I mean.