I had told others, that I would bring with me all the things I would bring to a full-blown interview. Now, knowing that only the written will be administered, I would temper that somewhat. If you bring everything (logbooks, letters of recommendation, employment records, transcripts) you will not be wrong, however, you will likely not need any of that. I still recommend coming in your interview uniform (business suit). You will likely be overdressed but it beats the alternative. I suspect that the recruiting team will be shirt and tie.