tug equipment identification

hello all

I am building a model of the polish tug 'taurus'. I am wondering what the cylindrical object circled in red is, a type of periscope?

Attachment 221481

Attachment 221482

thank you for any insight you may have to offer

Attached Images

	what is this object1.jpg (162.9 KB)
	what is this object2.jpg (121.5 KB)