I was going to post on HMAS Canberra this week but Paul Allen went and posted more images of USS Indianapolis (CA-35) last night. At the extensive depth of 18,000' (over 3.4 miles) the lack of oxygen has preserved the high-tensile steel of the ship incredibly well. At top is one of the cruiser's Mark 33 semi-enclosed fire control directors; often not photographed with all hatches opened, it presents a strange appearance compared to the much more common (and more advanced) Mk 37. The angle is looking at the top of the unit, the forward face is in the silt. Also shown is one of Indianapolis' triple 8"/55 turrets, with 20-B deck blue paint still clearly visible on the top half of her rifle barrels. As with all wreck photos, these are not mine, and carry the copyright mark of Allen's organization along with the name of the photographing submersible R/V Petrel.