![](/thumbs/pennsylvania/philadelphia/THM_7113_7115.png)
R8: Flag Insignia of Governmental Maritime Serivces
![](/thumbs/pennsylvania/philadelphia/THM_7116_7119.png)
R9: Coast Guard Cutters on International Ice Patrol
![](/thumbs/pennsylvania/philadelphia/THM_7120_7124.png)
R10: Derelicts Drifting Obstructions
![](/thumbs/pennsylvania/philadelphia/THM_7125_7129.png)
R11: Light Ships Signals of Distress/Overfalls Lightship
![](/thumbs/pennsylvania/philadelphia/THM_7130_7133.png)
R12: International Signal Code
![](/thumbs/pennsylvania/philadelphia/THM_7081_7087.png)
L3: Exports: Port of Philadelphia
![](/thumbs/pennsylvania/philadelphia/THM_7090_7094.png)
L5: Government Aids to Harbor Navigation
![](/thumbs/pennsylvania/philadelphia/THM_7102.png)
L6: Government Aid to Deep Sea Navigation - Captain Taking Observation
![](/thumbs/pennsylvania/philadelphia/THM_7098_7101.png)
L7: Foreign Imports to Philadelphia
![](/thumbs/pennsylvania/philadelphia/THM_7134.png)
United States Custom House