Cataldo and Atlantic EMS

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Radio System

Channel Frequency Type Tone Use Location Confirmation/Reconfirmation
Cataldo 1 159.3450 R D263 Ambulance (911) Dispatch Medford 2025.01.03 W1KNE
Cataldo 2 154.5050 R D263 BLS units, mostly transfers Everett 2025.01.10 W1KNE
Cataldo 3 155.1600 S D047 Talkaround
Cataldo 4 152.3975 R D263 Chair Car Quincy 2022.02.04 ecps92
Atlantic 1 152.9900 R D116 North Shore Dispatch Salem/Peabody 2024.06.14 W1KNE
Atlantic 2 155.3250 R D132 Chair Car Salem 2021.01.20 W1KNE
Atlantic 3 155.1600 S D263 Talkaround
Atlantic 4 152.2850 R 210.7 Appears to be used in Newburyport area Malden 2024.11.21 MASSBUSMARK
Atlantic 5 151.7300 R D263 Chair Car Boston 2022.01.07 JBolduc
Atlantic 6 153.3575 R D226 Alternate Newburyport area Dispatch Newburyport
Atlantic ? 151.9100 R D311 Ambulance Dispatch (depreciated) Peabody 2015.10.18 soffron31
Boston 1 152.3675 R D155 Ambulance Dispatch (Inactive?) Quincy 2021.03.12 ecps92
Boston 3 155.1600 S D132 Talkaround
Boston 4 159.5700 R D155 Transfers MetroWest 2024.01.13 W1KNE
Boston Tac 1 157.4525 R D365
Georgetown 152.4650 R D263 Georgetown 2018.03.08 ecps92
New - Amesbury 151.7300 R D263 Amesbury 2023.09.08 ecps92
New - Danvers 153.3425 R ? No longer has contract for town.
New - Peabody 151.6700 R ? Peabody
New - Peabody 157.4700 R ? Peabody
On-Board Repeater 458.0125 S 146.2 Only New Ambulances and Supervisors Systemwide 2024.01.06 ecps92


Dedicated Units

Each municipality has a dedicated Cataldo EMS ALS unit and backup is provided by additional ALS and BLS units. The primary trucks are as follows:

  • Somerville - P6 - 24hr ALS - Washington St Base
  • Chelsea - P1 - 24hr ALS - Hawthorne St Base
  • Revere - P5 - 24hr ALS - Brown Circle/American Legion Hwy Base
  • Malden - P3 - 24hr ALS - Canal St Base
  • Everett - P2 - 24hr ALS - Broadway Base
  • Saugus - P8 - 24hr ALS - Walnut St/Rt. 1 Base (Dispatched by Atlantic Division)
  • Melrose - P4 - 24hr ALS - Melrose Fire HQ


Dedicated Atlantic EMS units for the City of Lynn, additional ALS/BLS used as backup when needed

  • Medic 7 - 24hr ALS - High St Base
  • Ambulance 14 - 24hr BLS - High St Base
  • Ambulance 13 - 24hr BLS - North Franklin St Base
  • Ambulance 12 - 16hr BLS Sunday-Thursday (9am-1am), 24hr Friday/Saturday - North Franklin St Base
  • Ambulance 11 - 8hr BLS Monday-Friday (11am-7pm) - High St Base


Dedicated Atlantic EMS units for the City of Peabody, additional ALS/BLS used as backup when needed

  • Medic 1 - 24hr ALS - Foster St Base
  • Medic 2 - 24hr ALS - Peabody Eng 3 7a-7p Foster st 7p-7a
  • Medic 3 - 24hr ALS - Peabody Engine 7 Station
  • Ambulance 15 -12hr BLS (7am-7pm) -

Dedicated Atlantic EMS units for the City of Salem, additional ALS/BLS used as backup when needed

  • Medic 5 - 24hr ALS - Canal St Base
  • Ambulance 16 - 24hr BLS - Canal St Base


Dedicated Atlantic EMS units for the Town of Marblehead, additional ALS/BLS used as backup when needed

  • Medic 4 - 24hr ALS - Sewall St Base


Field Supervisors

  • Cataldo and Atlantic Field Supervisors utilize non-transporting ALS vehicles and the call signs are assigned individually, prefaced by "S" followed by the individual number (3-32)


Signal Codes

Cataldo uses mostly number codes to signify different statuses, such as to and from a call. These codes are heard rarely now as plain language is encouraged for radio transmissions.

  • Priority 1: Critical Emergency
  • Priority 2: Regular Emergency
  • Priority 3: Transfer/Non emergency
  • Signal 1: On the road/on the air
  • Signal 2: At scene
  • Signal 3: En route med facility (transporting)
  • Signal 4: Arriving at med facility
  • Signal 5: Still at the facility but available if needed
  • Signal 6: Clear/available for next call
  • Signal 7: Accident involving company vehicle
  • Signal 8: Contact Dispatch or specified person/location
  • Signal 9: Enroute to next call
  • Signal 10: Violent PT on board


Facility Codes

Numbers are also used to signify different facilities. Here are the most used.

  • 7 - BMC Harrison Ave
  • 11 - Cambridge Hospital
  • 26 - Children's Hospital
  • 64 - MGH Chelsea
  • 78 - Somerville Hospital
  • 88 - Whidden Hospital
  • 101 - Lawrence Memorial Hospital
  • 136 - Melrose Wakefield Hospital
  • 137 - Mt. Auburn Hospital
  • 145 - MGH Boston
  • 153 - Tufts/TMC/NEMC