The most important function of the navy, once it became clear that it didn´t make them a valuable ally for the British (a stupid idea to try finding friends by making yourself a danger to them) was preventing a close blockade, something they did well. Otherwise they planned to defeat the Royal Navy in detail, by catching small parts of the fleet with overwhelming superiority. At a few occasions early on they even had a chance to succeed, like the Scarborough raid but the orders of the Kaiser, who wanted to protect his toys, and the caution of their admirals, especially Ingenohl (in Hippers and perhaps Scheers case I suspect they would have been more aggressive without the strict orders) prevented them from using the chances they had.
Mind you except of a Scarborough with too aggressive Warrender and Beatty (certainly possible) none of these few chances would have changed much on its own.
As to navy-army coordination: it ranged between a bit (I vaguely remember a discussion between Hipper and Falkenhayn, when he took the OHL, but it did have no results) and none at all.
Mind you except of a Scarborough with too aggressive Warrender and Beatty (certainly possible) none of these few chances would have changed much on its own.
As to navy-army coordination: it ranged between a bit (I vaguely remember a discussion between Hipper and Falkenhayn, when he took the OHL, but it did have no results) and none at all.