ferries schedulle Uno/Naoshima - english

I'd like to travel Okayama/Naoshima early morning, vist the art sites there and return in the afternoon to Okayama to proceed in a shinkansen to Hiroshima.Is ths all doable in terms of time and using the JR pass? I cannot get access to a schedulled of the ferries from Uno to Naoshima..in english and I am having difficulty in planning it all.

Is ths all doable in terms of time and using the JR pass?

Depends on where you start your day. If you start in Okayama, it should be relatively easily doable.

I cannot get access to a schedulled of the ferries from Uno to Naoshima..in english and I am having difficulty in planning it all.

The schedules are below:
http://www1.biz.biglobe.ne.jp/~shikoku/diyaN4.html

The table which concerns you is the uppermost on the left, which is titled
宇野 ⇔ 直島（宮浦）（20分）

宇野 means Uno
直島（宮浦） means Naoshima (Miyanoura)
（20分） means that the ferry ride takes 20 minutes

The times in the first column (宇野発) are the departure times of ferries from Uno. The times in the second column (直島(宮浦)発) are the departure times of ferries from Naoshima's Miyanoura Port.

thanks for the tips