Gar leaving Pearl December 9, 1941, high periscope patrol using the Attack scope:
View from the bridge (who left that cursor there??):
View from the Observation periscope, looking aft:
You could see that coming, couldn't you?... Somehow or other, you have a portion of the periscope top or similar showing in your view Sniper450...
Edit: eh, it's not the periscope head... that's too rounded up top... can't get any of the other bridge pieces to look like that without doing strange viewing angles...