The Harpoon surface attack guided missile, AGM-84 series (AGM-84/C/D Tactical) air-launched missile, is an all-weather antiship attack weapon. The SLAM tactical missile, AGM-84E, is a standoff land attack missile. The Harpoon can be delivered from the F/A-18, P-3, and S-3 aircraft. Both missiles are AURs and require no assembly other than installation of the wing and control fin assemblies. The missile consists of the guidance section, warhead section, sustainer section, boattail section, wings, and control fins. The missile is approximately 151 inches in length and weighs approximately 1,144 pounds. 

The Harpoon missile has a low-level cruise trajectory with over-the-horizon range that makes it less susceptible to radar detection. It uses active guidance and has counter-countermeasure capability.

The guidance section contains the seeker, radar altimeter, midcourse guidance unit, and power supply. A radome on the front of the guidance section provides the required aerodynamic shield to protect the internal components of the seeker. During ground handling, a radome protector cap protects the radome. 

The warhead section contains a penetration blast type of explosive, the guided missile fuze, fuze booster, and the pressure probe assembly. It also provides internal routing of the interconnecting cable from the guidance section to other parts of the missile. 

The sustainer section contains the fuel tank and fuel supply system, missile battery, pyrotechnic relay panel, and the turbojet engine. Three BSU-4/B missile wings and one BSU-43/B missile wing are attached to the sustainer section by quick-attach, clevis-type fittings. These wings are attached to the missile at the organizational level. They provide the aerodynamic lift required sustaining missile flight. They are made of a framed aluminum honeycomb construction and are nonfolding.

The boattail section contains four control actuators, which control the control fins. Four identical nonfolding missile control fins (BSU-44/B) provide directional control of the missile's airframe proportional to the input signal received from the guidance section. The control fins are one-piece aluminum castings, and are attached to the control fin actuators by means of an integral torque-limiting, screw-type device.