USCG-USN Joint Ops- 233.7000
USCG-SAR 1- 237.9000
USCG-SAR 2 (Air/Sea Rescue)- 287.8000
USCG-Air Primary- 381.8000
USCG-Air Secondary- 383.9000
Combine these with the standard following USCG VHF:
USCG Cutters/Helos- Nautical F-21: 157.0500
US Nationwide Calling/Distress- Nautical F-16: 156.8000
USCG Tac 1: 162.1250
USCG Tac 2: 162.3250
USCG Tac 2: 163.1250
*Tac Freq's. may be encrypted*
USCG Law Enforcement A: 165.3125
USCG Law Enforcement B: 165.2625
*Law Enforcement Ops may be encrypted*
***Also monitor both of these as they will give valuable info during an aircraft emergency in coastal regions***
Military Aeronautical Emergency (UHF Gaurd): 243.0000
Civilian Aeronautical Emergency (VHF Gaurd): 121.5000
I personally have heard traffic on all of these when I was living in Charleston, SC, especially active on 9-11-01 and the following weeks.