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AN/SPG-51
Photo: Service Depicted: NavyCamera Operator: DON S. MONTGOMERY USN, (RET.) · Wikimedia Commons · Public domain
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AN/SPG-51

Air Defense Radars · United States
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AN/SPG-51

AN/SPG-51
AN/SPG-51 Photo: Service Depicted: NavyCamera Operator: DON S. MONTGOMERY USN, (RET.) · Wikimedia Commons · Public domain
* Absolute score — assessed within category · no era adjustment
Detection Range
75
Altitude Coverage
70
Target Capacity
65
ECCM
80
Low-Observable Detection
40
Mobility
60
Reliability
85
Tracking Quality
80
Technology
70
Cost-Effectiveness
75
Origin United States
CategoryAir Defense Radars
Operators9 countries
Data Quality85%
MASS(Military Archive Scoring System)
70
Air Defense Radars MASS Rating
36/111
All-Time
Air Defense Radars · 10 axes scored
Detection Range
75
Altitude Coverage
70
Target Capacity
65
ECCM
80
Low-Observable Detection
40
Mobility
60
Reliability
85
Tracking Quality
80
Technology
70
Cost-Effectiveness
75
ⓘ Regardless of era, the same scoring system applies to all units in the air defense radars category.
01 / Overview
AN/SPG-51
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
AIR DEFENSE RADARS
—
PERFORMANCE/PRICE
87
UNIT COST (2025 USD)
—
70
air defense radars category
ⓘ Performance/Price and MASS score are computed across all units in the air defense radars category, regardless of era.
02 / Specs & Design
◎General5MOD.5
  • System TypePulse-Doppler radar, Missile fire-control
  • Service Entry Year1960
  • Platformshipborne
  • MobileYes
  • In ServiceYes
◈Radar Performance6MOD.6
▣Electronic Warfare4MOD.4
◇Deployment1MOD.1
  • Platform Typedestroyers, frigates, cruisers
◆Production1MOD.1
  • Variants5
03 / History
04 / Operators
📖 TERMS ON THIS PAGE4terms
Radar system that provides three-dimensional target location by measuring azimuth, elevation, and range simultaneously.
Active jamming refers to electronic attack systems that transmit signals to disrupt enemy radar or communications, as opposed to passive systems that only receive and analyze signals.
Electronic Counter-Countermeasures (ECCM) features are system capabilities designed to mitigate enemy electronic jamming or interference against radar, communications, or other electronic warfare systems.
Mobile: a capability indicating the MANPADS can be transported and operated by a single soldier or small team, enabling rapid deployment and relocation.
These terms are listed automatically because they appear on this page.full encyclopedia →
📚 Sources
📖 ENCYCLOPEDIA Browse the Air Defense Radars entry →