The boat house is built out over the water (ie. The ocean is underneath the building) but, now all of a sudden, it has a rear door and a back fence with a bougainvillea growing over it.
FBI Agent Rush writes 216 names that she got from her computer and gives the list to Kensi, who then takes pictures to send to Eric. Rush could have printed the list, or even sent it electronically to Kensi or Eric.