| MHz | | Category | | Description | |
| 156.0500 | | Marine | | 01A Port Operations and Commercial. VTS in selected areas. | |
| 156.1750 | | Marine | | 63A Port Operations and Commercial. VTS in selected areas. | |
| 156.2500 | | Marine | | 05A Port Operations. VTS in Seattle | |
| 156.2750 | | Marine | | 65A Port Operations | |
| 156.3000 | | Marine | | 6 Intership Safety | |
| 156.3250 | | Marine | | 66A Port Operations | |
| 156.3500 | | Marine | | 07A Commercial | |
| 156.3750 | | Marine | | 67 Commercial. Used for Bridge-to-bridge communications in lower Mississippi River. Intership only. | |
| 156.4000 | | Marine | | 8 Commercial (Intership only) | |
| 156.4250 | | Marine | | 68 Non-Commercial | |
| 156.4500 | | Marine | | 9 Boater Calling. Commercial and Non-Commercial. | |
| 156.4750 | | Marine | | 69 Non-Commercial | |
| 156.5000 | | Marine | | 10 Commercial | |
| 156.5250 | | Marine | | 70 Digital Selective Calling (voice communications not allowed) | |
| 156.5500 | | Marine | | 11 Commercial. VTS in selected areas. | |
| 156.5750 | | Marine | | 71 Non-Commercial Active in Ocean City, MD | |
| 156.6000 | | Marine | | 12 Port Operations. VTS in selected areas. | |
| 156.6250 | | Marine | | 72 Non-Commercial (Intership only) | |
| 156.6500 | | Marine | | 13 Intership Navigation Safety (Bridge-to-bridge). Ships >20m length maintain a listening watch on this channel in US waters. Rt 50 DrawBridge Ocean City, MD | |
| 156.6750 | | Marine | | 73 Port Operations | |
| 156.7000 | | Marine | | 14 Port Operations. VTS in selected areas. | |
| 156.7250 | | Marine | | 74 Port Operations | |
| 156.7500 | | Marine | | 15 Environmental (Receive only). Used by Class C EPIRBs. | |
| 156.8000 | | Marine | | 16 International Distress, Safety and Calling. Ships required to carry radio, USCG, and most coast stations maintain a listening watch on this channel. | |
| 156.8500 | | Marine | | 17 State Control - Active in Ocean City, MD | |
| 156.8750 | | Marine | | 77 Port Operations (Intership only) | |
| 156.9000 | | Marine | | 18A Commercial Active in Ocean City, MD | |
| 156.9250 | | Marine | | 78A Non-Commercial Active in Ocean City, MD | |
| 156.9500 | | Marine | | 19A Commercial Active in Ocean City, MD | |
| 156.9750 | | Marine | | 79A Commercial | |
| 157.0000 | | Marine | | 20 Port Operations (duplex) | |
| 157.0000 | | Marine | | 20A Port Operations | |
| 157.0250 | | Marine | | 80A Commercial | |
| 157.0500 | | Marine | | 21A U.S. Coast Guard only | |
| 157.0750 | | Marine | | 81A U.S. Government only - Environmental protection operations. | |
| 157.1000 | | Marine | | 22A Coast Guard Liaison and Maritime Safety Information Broadcasts. Broadcasts announced on channel 16. Police & USCG Ocean City, MD | |
| 157.1250 | | Marine | | 82A U.S. Government only | |
| 157.1500 | | Marine | | 23A U.S. Coast Guard only Police & USCG Ocean City, MD | |
| 157.1750 | | Marine | | 83A U.S. Coast Guard only | |
| 157.2000 | | Marine | | 24 Public Correspondence (Marine Operator) | |
| 157.2250 | | Marine | | 84 Public Correspondence (Marine Operator) 161.825 | |
| 157.2500 | | Marine | | 25 Public Correspondence (Marine Operator) | |
| 157.2750 | | Marine | | 85 Public Correspondence (Marine Operator) 161.875 | |
| 157.3000 | | Marine | | 26 Public Correspondence (Marine Operator) | |
| 157.3250 | | Marine | | 86 Public Correspondence (Marine Operator) 161.925 | |
| 157.3500 | | Marine | | 27 Public Correspondence (Marine Operator) | |
| 157.3750 | | Marine | | 87 Public Correspondence (Marine Operator) 161.975 | |
| 157.4000 | | Marine | | 28 Public Correspondence (Marine Operator) | |
| 157.4250 | | Marine | | 88 Public Correspondence only near Canadian border. 162.025 | |
| 161.8250 | | Marine | | Marine Operator 84 161.825 | |
| 161.8750 | | Marine | | Marine Operator 85 161.875 | |
| 161.9250 | | Marine | | Marine Operator 86 161.925 | |
| 161.9750 | | Marine | | Marine Operator 87 161.975 | |
| 162.0250 | | Marine | | Marine Operator 88 162.025 | |
| 2.1820 | | Marine Distress | | Marine Distress | |
| 4.1250 | | Marine Distress | | Marine Distress | |
| 6.2150 | | Marine Distress | | Marine Distress | |
| 8.2910 | | Marine Distress | | Marine Distress | |
| 12.2900 | | Marine Distress | | Marine Distress | |
| 16.4200 | | Marine Distress | | Marine Distress | |
| 4.0150 | | MARS | | Military Amateur Radio Service | |
| 33.1400 | | McDonalds | | McDonalds of Bel Air | |
| 151.8950 | | McDonalds | | McDonalds of Bel Air | |
| 31.3400 | | MD Govt | | State D.N.R. - Channel A (Administrative) | |
| 31.4600 | | MD Govt | | State D.N.R. - Channel C (Command/Water Resources) | |
| 47.1400 | | MD Govt | | State D.O.T. - F-4 | |
| 47.2000 | | MD Govt | | State D.O.T. - F-5 | |
| 47.2600 | | MD Govt | | State D.O.T. - F-2 | |
| 47.3200 | | MD Govt | | State D.O.T. - F-1 | |
| 47.4000 | | MD Govt | | State D.O.T. - F-3 | |
| 151.0400 | | MD Govt | | State D.O.T. | |
| 151.1450 | | MD Govt | | State D.N.R. - F-3 (Forestry & Parks) | |
| 151.2500 | | MD Govt | | State D.N.R. - F-6 (Forestry) | |
| 151.3100 | | MD Govt | | State D.N.R. - F-7 (Parks/Enforcement) | |
| 151.3250 | | MD Govt | | State D.N.R. - F-2 (Parks/Enforcement) | |
| 151.3550 | | MD Govt | | State D.N.R. - F-4 (Forestry) | |
| 151.4150 | | MD Govt | | State D.N.R. - F-5 (Parks/Enforcement) | |
| 151.4600 | | MD Govt | | State D.N.R. - F-1 (Forestry) | |
| 155.7750 | | MD Govt | | State Services | |
| 159.2850 | | MD Govt | | State D.N.R. - F-8 (Forest Fire Compact) | |
| 159.4500 | | MD Govt | | State D.N.R. | |
| 453.1630 | | MD Govt | | State Services | |
| 458.9620 | | MD Govt | | State D.O.T. | |
| 161.6400 | | Media | | Bel Air Broadcasting Company | |
| 161.7000 | | Media | | Chesapeake Broadcasting Corporation | |
| 450.5870 | | Media | | Mackk Broadcasting Company | |
| 464.4500 | | Media | | Maryland Fire Network | |
| 947.0000 | | Media | | Prettyman Broadcasting Company - S.T.L. | |
| 947.5000 | | Media | | New Harford Group - S.T.L. | |
| 951.0000 | | Media | | Harford Community College - S.T.L. | |
| 450.4875 | | Media | | Metro Traffic base | |
| 151.8200 | | MURS | | MURS Channel, 2 watts TPO, narrow 11.25K | |
| 151.8800 | | MURS | | MURS Channel 2, 2 watts TPO, narrow 11.25K | |
| 151.9400 | | MURS | | MURS Channel 3, 2 watts TPO, narrow 11.25K | |
| 154.5700 | | MURS | | "Blue Dot" MURS Channel 4, 2 watts TPO, wide 12.5K | |
| 154.6000 | | MURS | | "Green Dot" MURS, 2 watts TPO, wide 12.5K | |
| 151.6250 | | MURS | | "Red Dot" MURS...Multi Use Radio Service, License Free, ERP limited to 5 watts | |
| 151.9550 | | MURS | | "Purple Dot" MURS...Multi Use Radio Service, License Free, ERP limited to 5 watts | |
| 35.9000 | | MURS | | McComas Funeral Home, Abingdon, MD | |