RV-5MD1 is a modernized airborne radio altimeter designed to provide continuous, real-time measurement of true aircraft height above ground or water during low-altitude flight.
The system operates on the principle of continuous-wave radar transmission and reception, processing reflected signals to compute accurate altitude independent of barometric pressure or terrain variations.

Compared to earlier RV-5M models, the RV-5MD1 incorporates functional upgrades including improved signal filtering, refined reliability logic, and the capability to output compatible data into broader avionics architectures.
In particular, RV-5MD1 versions equipped with the PP-5M1D1 transceiver support integration with collision-avoidance and surveillance systems (TCAS/RA interoperability), enabling distribution of height data outside the local indicator loop.

The RV-5MD1 system provides:
• display of true radio altitude on a dedicated cockpit indicator;
• adjustable Danger Height presets with light annunciation;
• FAIL/INOP indication;
• altitude-triggered pulse outputs;
• automatic built-in test support;
• continuous operation at low altitude in varied terrain.

A complete RV-5MD1 installation typically includes:
— PP-5M1D1 transmitter-receiver unit,
— two AR5-1 antennas,
— UV-5M cockpit altitude indicator,
— RA-5 shock-mount frame,
— aircraft interconnection cabling and documentation.

The system is used on helicopters and aircraft and provides pilots with reliable and independent altitude data for safe low-altitude operations.

RV-5MD1, RV5MD1, RB-5MD1, radio altimeter 5MD1, 5M1D1 system

Product Name: Radio Altimeter System
Designation: RV-5MD1
System Type: Continuous-wave radar altimeter
Altitude Measurement Range: 0–300 / 0–750 / 0–1000 m (depending on indicator fitted)
Operating Frequency Band: 4200–4400 MHz
Transceiver Unit: PP-5M1D1
Cockpit Indicator: UV-5M
Antennas: AR5-1 (2 pcs)
Mounting Hardware: RA-5 shock-mount frame
Data Outputs: Analog altitude + pulse outputs
Danger Height Warning: Integrated with indicator
Failure Indication: Lamp and drop-flag through indicator
External System Support: Compatible with TCAS / avionics (via PP-5M1D1)
Power Supply: 27 VDC and 115 VAC, 400 Hz
Continuous Operation Duration: Up to 6 hours
Warm-Up: Automatic
Typical Application: Low-altitude aircraft and helicopter operations
Documentation: Passport and manual available
Condition: As applicable

All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.

In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.

Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.

Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.