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  3. RS20S vs GX1800GPS/E

Simrad RS20S vs Standard Horizon GX1800GPS/E

What RS20S does better (0) and where GX1800GPS/E wins (2) — every spec side by side.

Simrad RS20S
Simrad · 2025RS20S
5.4Score
0 advantages≈ £360
vs
Standard Horizon GX1800GPS/E
Standard Horizon · 2026GX1800GPS/E
9.2Score
2 advantages≈ £390
Higher score
3.6Ruggedness8.8
7.3Features7.3
Dimensions

Size comparison

RS20SGX1800GPS/E
167 × 16189150 × 8582
RS20SGX1800GPS/EDifference
Height161 mm85 mm+76 mm
Width167 mm150 mm+17 mm
Depth89 mm82 mm+7 mm
Weight1,180 g940 g+240 g

Drawn to the same scale from the official dimensions (front and side).

Why is RS20S better than GX1800GPS/E?

RS20S has no measurable advantages in this pair.

Why is GX1800GPS/E better than RS20S?

  1. Water protection (IPx)IPx7 vs IPx8+14%
  2. Weight1,180 g vs 940 g+26%
Specifications

Side by side

Simrad RS20SSimrad RS20S≈ £3605.4
Radio & range
Radio standardsAmateur VHF, Marine VHFAmateur VHF, Marine VHF
Frequency ranges156.050 - 163.275 MHz156.025 - 163.275 MHz
Transmit power25 W25 W
Squelchadjustableadjustable
Power & battery
Battery voltage12 V13.8 V
Power sourceMains / 12 V vehicleMains / 12 V vehicle
USB-C charging—No
Design & durability
Weight1,180 g940 g
Width167 mm150 mm
Height161 mm85 mm
Depth89 mm82 mm
Protection ratingIPX7IPX8
Water protection (IPx)IPx7IPx8
DisplayBacklit displayBacklit display
ColoursBlackBlack
Features
Channel scanYesYes
Dual watchYesYes
Emergency / SOS alarmYesYes
Key lock—Yes
GPSYesYes
PC programmable—Yes
Connectivity
Headset / earpiece jackYesYes
Connectors—8‑polige Mikrofonbuchse
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