The Antenna Unit The APN-242 Antenna Unit consists of a flat plate arrayand mounting pedestal and uses the existing APN-59installation and mounting brackets. The array elementimproves target detection ranges and is electronicallycontrolled to permit instantaneous fan/pencil beamswitching. The antenna rotates freely through 360º and isconnected to existing aircraft attitude reference systems toprovide antenna stabilization throughout the normalrange of aircraft maneuvers. High reliability is achievedthrough the elimination of all gears, improving antennaMTBF by a factor of fifty.

The Receiver/Transmitter The APN-242 Receiver/Transmitter uses a lower powersolid state design, a low-noise receiver and a three to onecomponent reduction to improve system performance andgreatly increase reliability. Transmit power is generated bya 10,000 hour service life state-of-the-art magnetron withdigitally controlled pulse width, pulse repetition rates,intermediate frequency (IF) and video amplification,mode switching and built-in-test (BIT).

The Display GroupThe ASN-165 Display Group provides a vivid color ormonochrome radar image in ambient lighting. Thesehigh resolution displays are overlaid with aircraftnavigation data such as true heading, ground speed andtrack angle error. A latitude/longitude stabilized cursor isprovided to aid drop zone and waypoint identification.Depending on the aircraft mission design series, datafrom the station keeping equipment (SKE), self-containednavigation system (SCNS) and traffic collision avoidancesystem (TCAS) can be integrated and displayed. In thegreen mode, the displays are night vision gogglecompatible.

AN/APN-242 Color Weather & Navigation Radar Sperry Marine

Weather Detection and AvoidanceDetects weather with full color, black andwhite, or green displays of storms out to240NM.

Terrain Mapping and Navigation High resolution ground mapping mode withlatitude/longitude stabilized electronic cursorto provide range and azimuth information towaypoint.

Aircraft Detection Skin paints fighter aircraft at extended rangesthrough intervening rain showers concurrentwith other operating modes.

Beacon and IFF Interrogation Detects airborne and ground beacons andoptionally interrogates IFF equipped aircraftout to 100NM.

Dramatically Improved System Mean-Time Between Failure Rate As APN-59 systems age, radar failures arebecoming a leading cause of C-130 and C-135 aircraft downtime. Today’s APN-242 hashalf the number of line replaceable units(LRUs) and greater than an order ofmagnitude improvement in system mean-time between failures (MTBF).

Field Installation By Unit LevelMaintenance In A DayNo depot required. APN-242 can be installedusing existing radar cabling, connectionsand mounts without aircraft modification.

Pays for itselfFrom operations and maintenance (O&M)savings.

In production Off the shelf and in inventory for immediatedeliveries.

AntennaSubsystem

StabilizationData Generator

Stabilization FromAircraft System

New AntennaInterface Box

(Fits ECA Location)

New ReceiverTransmitter

(Fits Same Location)

New Video Processor(Fits PP1073 Location)

New Pilot’s Display(Fits Same Location)

MIL-STD-1553B &Analog Interfaces(Overlays & Other

System Inputs)

New Radar/NAVControl Panel

▼

▼

▼

▼▼

▼

▼

▼

▼

▼

▼

▼

▼

New NavigatorAzimuth-Range

Indicator (Fits Same Location)

New Antenna(Fits Same Location)

Radar ReceiverTransmitter

Fans

Radar SetControl

AntennaControl

Azimuth-RangeIndicator (Pilot)

Power Supply

Power Supply Azimuth-RangeIndicator (Navigator)

SynchronizerControl

ElectronicSynchronizer

Control & Display Subsystem

ElectronicMarker

GeneratorGenerator

ControlTo Nav

Computer

Antenna▼

▼

▼

▼

▼ ▼▼ ▼

▼ ▼

▼

▼

▼

Previous Configuration: APN-59

APN-242 Modes of Operation

Today’s Consolidated Configuration: APN-242

APN-59E/F APN-242

System MTBF Under 100 Hours Greater than 1000 hoursWeight 244 lbs. 205 lbs.Power Consumption 1600W 800WAntenna Beam Switching Mechanical Electronic (Instantaneous)Antenna Stabilization Internal Gyro Inertial Reference SystemCooling External Fans None RequiredDaylight Viewable

Non-Fade Display None StandardElectronic Cursor with

Integrated Graphics Overlay None StandardColor Weather Contour Map None StandardBuilt-In Test None Standard

Form, Fit and Function Replacement for the APN-59 Radar

In Production For USAF

Coastal Navigation Weather and Storm Center Detection

Enhanced Terrain Mapping

Aircraft Detection RC-135

All screens are actual video capture from cockpit videotape

Beacon and IFF Interrogation

The Antenna Unit The APN-242 Antenna Unit consists of a flat plate arrayand mounting pedestal and uses the existing APN-59installation and mounting brackets. The array elementimproves target detection ranges and is electronicallycontrolled to permit instantaneous fan/pencil beamswitching. The antenna rotates freely through 360º and isconnected to existing aircraft attitude reference systems toprovide antenna stabilization throughout the normalrange of aircraft maneuvers. High reliability is achievedthrough the elimination of all gears, improving antennaMTBF by a factor of fifty.

The Receiver/Transmitter The APN-242 Receiver/Transmitter uses a lower powersolid state design, a low-noise receiver and a three to onecomponent reduction to improve system performance andgreatly increase reliability. Transmit power is generated bya 10,000 hour service life state-of-the-art magnetron withdigitally controlled pulse width, pulse repetition rates,intermediate frequency (IF) and video amplification,mode switching and built-in-test (BIT).

The Display GroupThe ASN-165 Display Group provides a vivid color ormonochrome radar image in ambient lighting. Thesehigh resolution displays are overlaid with aircraftnavigation data such as true heading, ground speed andtrack angle error. A latitude/longitude stabilized cursor isprovided to aid drop zone and waypoint identification.Depending on the aircraft mission design series, datafrom the station keeping equipment (SKE), self-containednavigation system (SCNS) and traffic collision avoidancesystem (TCAS) can be integrated and displayed. In thegreen mode, the displays are night vision gogglecompatible.

AN/APN-242 Color Weather & Navigation Radar Sperry Marine

Weather Detection and AvoidanceDetects weather with full color, black andwhite, or green displays of storms out to240NM.

Terrain Mapping and Navigation High resolution ground mapping mode withlatitude/longitude stabilized electronic cursorto provide range and azimuth information towaypoint.

Aircraft Detection Skin paints fighter aircraft at extended rangesthrough intervening rain showers concurrentwith other operating modes.

Beacon and IFF Interrogation Detects airborne and ground beacons andoptionally interrogates IFF equipped aircraftout to 100NM.

Dramatically Improved System Mean-Time Between Failure Rate As APN-59 systems age, radar failures arebecoming a leading cause of C-130 and C-135 aircraft downtime. Today’s APN-242 hashalf the number of line replaceable units(LRUs) and greater than an order ofmagnitude improvement in system mean-time between failures (MTBF).

Field Installation By Unit LevelMaintenance In A DayNo depot required. APN-242 can be installedusing existing radar cabling, connectionsand mounts without aircraft modification.

Pays for itselfFrom operations and maintenance (O&M)savings.

In production Off the shelf and in inventory for immediatedeliveries.

AntennaSubsystem

StabilizationData Generator

Stabilization FromAircraft System

New AntennaInterface Box

(Fits ECA Location)

New ReceiverTransmitter

(Fits Same Location)

New Video Processor(Fits PP1073 Location)

New Pilot’s Display(Fits Same Location)

MIL-STD-1553B &Analog Interfaces(Overlays & Other

System Inputs)

New Radar/NAVControl Panel

▼

▼

▼

▼▼

▼

▼

▼

▼

▼

▼

▼

▼

New NavigatorAzimuth-Range

Indicator (Fits Same Location)

New Antenna(Fits Same Location)

Radar ReceiverTransmitter

Fans

Radar SetControl

AntennaControl

Azimuth-RangeIndicator (Pilot)

Power Supply

Power Supply Azimuth-RangeIndicator (Navigator)

SynchronizerControl

ElectronicSynchronizer

Control & Display Subsystem

ElectronicMarker

GeneratorGenerator

ControlTo Nav

Computer

Antenna▼

▼

▼

▼

▼ ▼▼ ▼

▼ ▼

▼

▼

▼

Previous Configuration: APN-59

APN-242 Modes of Operation

Today’s Consolidated Configuration: APN-242

APN-59E/F APN-242

System MTBF Under 100 Hours Greater than 1000 hoursWeight 244 lbs. 205 lbs.Power Consumption 1600W 800WAntenna Beam Switching Mechanical Electronic (Instantaneous)Antenna Stabilization Internal Gyro Inertial Reference SystemCooling External Fans None RequiredDaylight Viewable

Non-Fade Display None StandardElectronic Cursor with

Integrated Graphics Overlay None StandardColor Weather Contour Map None StandardBuilt-In Test None Standard

Form, Fit and Function Replacement for the APN-59 Radar

In Production For USAF

Coastal Navigation Weather and Storm Center Detection

Enhanced Terrain Mapping

Aircraft Detection RC-135

All screens are actual video capture from cockpit videotape

Beacon and IFF Interrogation

The Antenna Unit The APN-242 Antenna Unit consists of a flat plate arrayand mounting pedestal and uses the existing APN-59installation and mounting brackets. The array elementimproves target detection ranges and is electronicallycontrolled to permit instantaneous fan/pencil beamswitching. The antenna rotates freely through 360º and isconnected to existing aircraft attitude reference systems toprovide antenna stabilization throughout the normalrange of aircraft maneuvers. High reliability is achievedthrough the elimination of all gears, improving antennaMTBF by a factor of fifty.

The Receiver/Transmitter The APN-242 Receiver/Transmitter uses a lower powersolid state design, a low-noise receiver and a three to onecomponent reduction to improve system performance andgreatly increase reliability. Transmit power is generated bya 10,000 hour service life state-of-the-art magnetron withdigitally controlled pulse width, pulse repetition rates,intermediate frequency (IF) and video amplification,mode switching and built-in-test (BIT).

The Display GroupThe ASN-165 Display Group provides a vivid color ormonochrome radar image in ambient lighting. Thesehigh resolution displays are overlaid with aircraftnavigation data such as true heading, ground speed andtrack angle error. A latitude/longitude stabilized cursor isprovided to aid drop zone and waypoint identification.Depending on the aircraft mission design series, datafrom the station keeping equipment (SKE), self-containednavigation system (SCNS) and traffic collision avoidancesystem (TCAS) can be integrated and displayed. In thegreen mode, the displays are night vision gogglecompatible.

AN/APN-242 Color Weather & Navigation Radar Sperry Marine

Weather Detection and AvoidanceDetects weather with full color, black andwhite, or green displays of storms out to240NM.

Terrain Mapping and Navigation High resolution ground mapping mode withlatitude/longitude stabilized electronic cursorto provide range and azimuth information towaypoint.

Aircraft Detection Skin paints fighter aircraft at extended rangesthrough intervening rain showers concurrentwith other operating modes.

Beacon and IFF Interrogation Detects airborne and ground beacons andoptionally interrogates IFF equipped aircraftout to 100NM.

Dramatically Improved System Mean-Time Between Failure Rate As APN-59 systems age, radar failures arebecoming a leading cause of C-130 and C-135 aircraft downtime. Today’s APN-242 hashalf the number of line replaceable units(LRUs) and greater than an order ofmagnitude improvement in system mean-time between failures (MTBF).

Field Installation By Unit LevelMaintenance In A DayNo depot required. APN-242 can be installedusing existing radar cabling, connectionsand mounts without aircraft modification.

Pays for itselfFrom operations and maintenance (O&M)savings.

In production Off the shelf and in inventory for immediatedeliveries.

AntennaSubsystem

StabilizationData Generator

Stabilization FromAircraft System

New AntennaInterface Box

(Fits ECA Location)

New ReceiverTransmitter

(Fits Same Location)

New Video Processor(Fits PP1073 Location)

New Pilot’s Display(Fits Same Location)

MIL-STD-1553B &Analog Interfaces(Overlays & Other

System Inputs)

New Radar/NAVControl Panel

▼

▼

▼

▼▼

▼

▼

▼

▼

▼

▼

▼

▼

New NavigatorAzimuth-Range

Indicator (Fits Same Location)

New Antenna(Fits Same Location)

Radar ReceiverTransmitter

Fans

Radar SetControl

AntennaControl

Azimuth-RangeIndicator (Pilot)

Power Supply

Power Supply Azimuth-RangeIndicator (Navigator)

SynchronizerControl

ElectronicSynchronizer

Control & Display Subsystem

ElectronicMarker

GeneratorGenerator

ControlTo Nav

Computer

Antenna▼

▼

▼

▼

▼ ▼▼ ▼

▼ ▼

▼

▼

▼

Previous Configuration: APN-59

APN-242 Modes of Operation

Today’s Consolidated Configuration: APN-242

APN-59E/F APN-242

System MTBF Under 100 Hours Greater than 1000 hoursWeight 244 lbs. 205 lbs.Power Consumption 1600W 800WAntenna Beam Switching Mechanical Electronic (Instantaneous)Antenna Stabilization Internal Gyro Inertial Reference SystemCooling External Fans None RequiredDaylight Viewable

Non-Fade Display None StandardElectronic Cursor with

Integrated Graphics Overlay None StandardColor Weather Contour Map None StandardBuilt-In Test None Standard

Form, Fit and Function Replacement for the APN-59 Radar

In Production For USAF

Coastal Navigation Weather and Storm Center Detection

Enhanced Terrain Mapping

Aircraft Detection RC-135

All screens are actual video capture from cockpit videotape

Beacon and IFF Interrogation

Sperry Marine

AN/APN-242Color Weather & Navigation Radar

Sperry Marine

©Northrop Grumman Electronic Systems — Sperry Marine BR-0019B • 2M • 9/02 Printed in U.S.A.

Over 400 Locations Worldwide

www.sperry-marine.comFor more information, please contact:Sperry Marine

USA1070 Seminole TrailCharlottesville, VA 22901-2891 USAPh: +1 434-974-2000Fax: +1 434-974-2259ISO 9001

Sperry Marine

AC-130

C-130H

C-130E

WC-130

KC-135R

MC-130P

MOUNTING SURFACE

Operating ParametersFrequencies Radar operation: X-band 9375 ±10

MHz; beacon reception 9310 MHzTransmitted Power 25 kW nominal peak (new high

reliability magnetron)Receiver Noise Figure 6.5 db nominalRange Scale 2.5 to 20 (2.5 NM increments), 25,

30, 50, 100 and 240 NMPulse Length Multiple lengths (0.2, 0.8, 2.35 and

4.5 microseconds), automaticallyselected for different ranges andfunctions

Pulse Repetition Frequency .2 µsec @ 1024 Hz.8 µsec @ 350 Hz

2.35 µsec@ 350 Hz4.5 µsec @ 180 Hz

Scanning Features 360-degree scan rates: 12 rpm onlong range functions; 45 rpm onshort range functionsSector scan: approximately 90degrees centered about forwardposition

Antenna Beam Selection Pencil or fan beam, both with 3-degree azimuth beamwidth andinstantaneous electronic switching

Antenna Stabilization Stabilized to existing aircraftreference throughout a range of±15 degrees pitch and ±30 degreesroll

Navigation Features Manual electronic cursor withlatitude/longitude or range/bearingreadout; latitude/longitudestabilized for fly to waypointcapability

Maximum Operating Conditions

Operating Temperature (Internal Equipment)Parameter Normal OperationNavigator & Pilot Indicators -15 to +55° CAntenna Interface Unit -55 to +55° CVideo Processor -40 to +55° CReceiver/Transmitter &Antenna Operating Temperature -55 to +55° CStorage Temperature -57 to +85° CAircraft Altitude (Uninhabited) -1,500 to 50,000 feetCabin Pressure (Inhabited) 0 to 8,000 feetMaximum Level Flight Speed 400 knots EASVertical Speed ± 1,500 ft/minPitch Angle ± 15°Bank Angle ± 30° (stabilized)

± 60° (unstabilized)

LRU Weight/SizeUnit Dimensions WeightAntenna 35.8 x 35.8 x 34.0 in 69.0 lbs

908.0 x 908.0 x 864.0 mm 31.4 kgAntenna Interface 6.5 x 5.5 x 10.7 in 7.0 lbs

165.0 x 140.0 x 272.0 mm 3.2 kgReceiver/Transmitter 15.3 in dia. 15.1 in ht. 65.0 lbs

387.0 mm dia., 384.0 mm ht. 29.5 kgVideo Processor 7.75 x 7.75 x 12.3 in 25.0 lbs

197.0 x 197.0 x 324.0 mm 11.3 kgPilot’s Indicator 6.5 x 6.5 x 12.0 in 12.0 lbs

165.0 x 165.0 x 305.0 mm 5.4 kgNavigator’s Indicator 8.5 x 10.0 x 12.8 in 21.0 lbs

216.0 x 254.0 x 323.0 mm 9.5 kgNavigator’s Control 6.0 x 10.0 x 3.8 in 5.5 lbs

152.0 x 254.0 x 95.0 mm 2.5 kg

APN-242 Dimensions and Operating Parameters

35.76in/908mm

8.5 in/216mm

12.50in/318mm

18.00in/457mm

25.75in/ 654mm Max

ALL DIMENSIONS AND WEIGHTS ARE APPROXIMATE

8.29in/211mm

5.7 in/145mm

SWEEP VOLUME

RADIUS 17.88IN/454MM MAX

15.1˝ HEIGHT

15.25˝ DIAMETER