SL30-style NAV/COM

A NAV/COM in the style of the SL30, its single line of amber LED dot-matrix characters showing the active and standby frequencies plus the VOR radial, or an OBS page with a bar-graph CDI. SEL opens recall lists (nearby stations, recent, user, weather, emergency). Comes as NAV/COM 1 or NAV/COM 2.

Modeled on: Garmin (Apollo) SL30-style NAV/COM
Category: Radios and panels
Size: 2 × 1 cells
Version: 1.0 · 2026-10-19
Plan: Pro
Simulators: MSFS 2020 · MSFS 2024 · X-Plane 11 · X-Plane 12

Variants

NAV/COM 1v1.0

Tunes COM 1 / NAV 1, OBS turns the NAV 1 course

Picker: RADIO > NAV/COM 1

NAV/COM 2v1.0

Tunes COM 2 / NAV 2, OBS turns the NAV 2 course

Picker: RADIO > NAV/COM 2

Features

32-character amber LED line: the active, then s (or m while monitoring) and the standby
Right side: the VOR ident and the radial from it, or the bearing to it with T/F; 'vor ---' without a valid signal
OBS page: the course, to / fr, and a bar-graph CDI; '---flagged---' without a valid signal
TX under the active while transmitting on that COM
SEL recall lists: COM remote (airports around), autolist (recent), user, weather (162.400-162.550), emergency (121.50); NAV remote VORs, autolist, user
ENT stores the standby as a user frequency ('store as <ident>', 'Database Full' at 15)
Green LEDs over COM, NAV, SYS, OBS, ID and SEL when active
SYS pages listed as on the real unit (display only)
Display dark without avionics power; dimmed at night, faceplate under the red flood light

On the iPad

Drag the dual knob: outer MHz, inner channel of COM or NAV; on the OBS page it turns the course (outer 10 degrees, inner 1 degree); in recall lists outer picks the list, inner the entry
Tap the swap key to swap active and standby (in a list, loads the entry first)
Tap COM or NAV to select that radio; tap it again to toggle monitoring its standby
Tap OBS for the OBS page; tap OBS again to center the needle on the current radial
Tap T/F to switch between the radial FROM and the bearing TO the station
Tap ID to cycle ident off / IDENT / VOICE (toggles the NAV ident audio)
Tap SEL for the recall lists, ENT to load the entry into the standby (or to store the standby)
Tap SYS for the system pages

Settings

Which radio: NAV/COM 1 or NAV/COM 2 (picker variant)

Keys and controllers

Map any of these to a key, a game controller's button or axis, or a MIDI knob (how):

COM 1 MHz +
COM 1 MHz -
COM 1 channel +
COM 1 channel -
COM 1 swap
NAV 1 MHz +
NAV 1 MHz -
NAV 1 channel +
NAV 1 channel -
NAV 1 swap

Simulator data

What the Hub reads from the simulator for this instrument, and what the instrument sends back. Names are the simulators' own: MSFS SimVars and events, X-Plane datarefs and commands.

Reads

Value	MSFS	X-Plane
COM1 active frequency (kHz)	`COM ACTIVE FREQUENCY:1 (MHz)`	`sim/cockpit2/radios/actuators/com1_frequency_hz_833`
COM1 standby frequency (kHz)	`COM STANDBY FREQUENCY:1 (MHz)`	`sim/cockpit2/radios/actuators/com1_standby_frequency_hz_833`
COM2 active frequency (kHz)	`COM ACTIVE FREQUENCY:2 (MHz)`	`sim/cockpit2/radios/actuators/com2_frequency_hz_833`
COM2 standby frequency (kHz)	`COM STANDBY FREQUENCY:2 (MHz)`	`sim/cockpit2/radios/actuators/com2_standby_frequency_hz_833`
NAV1 active frequency (kHz)	`NAV ACTIVE FREQUENCY:1 (MHz)`	`sim/cockpit2/radios/actuators/nav1_frequency_hz`
NAV1 standby frequency (kHz)	`NAV STANDBY FREQUENCY:1 (MHz)`	`sim/cockpit2/radios/actuators/nav1_standby_frequency_hz`
NAV2 active frequency (kHz)	`NAV ACTIVE FREQUENCY:2 (MHz)`	`sim/cockpit2/radios/actuators/nav2_frequency_hz`
NAV2 standby frequency (kHz)	`NAV STANDBY FREQUENCY:2 (MHz)`	`sim/cockpit2/radios/actuators/nav2_standby_frequency_hz`
COM transmitting: 1, 2, 0 none (enum)	`COM TRANSMIT:1 (bool)COM TRANSMIT:2 (bool)`	`sim/cockpit2/radios/actuators/audio_com_selection`
NAV1 receiving a station (1/0) (bool)	`NAV HAS NAV:1 (bool)`	`sim/cockpit2/radios/indicators/nav1_flag_from_to_pilot`
NAV1 receiver course deviation, + = course right (dots (-2.5..2.5))	`NAV CDI:1 (number)`	`sim/cockpit2/radios/indicators/nav1_hdef_dots_pilot`
NAV1 TO/FROM: 0 off, 1 TO, 2 FROM (enum)	`NAV TOFROM:1 (enum)`	`sim/cockpit2/radios/indicators/nav1_flag_from_to_pilot`
NAV1 OBS course (deg)	`NAV OBS:1 (degrees)`	`sim/cockpit2/radios/actuators/nav1_obs_deg_mag_pilot`
NAV2 receiving a station (1/0) (bool)	`NAV HAS NAV:2 (bool)`	`sim/cockpit2/radios/indicators/nav2_flag_from_to_pilot`
NAV2 receiver course deviation, + = course right (dots (-2.5..2.5))	`NAV CDI:2 (number)`	`sim/cockpit2/radios/indicators/nav2_hdef_dots_pilot`
NAV2 TO/FROM: 0 off, 1 TO, 2 FROM (enum)	`NAV TOFROM:2 (enum)`	`sim/cockpit2/radios/indicators/nav2_flag_from_to_pilot`
NAV2 OBS course (deg)	`NAV OBS:2 (degrees)`	`sim/cockpit2/radios/actuators/nav2_obs_deg_mag_pilot`
Aircraft latitude (deg)	`PLANE LATITUDE (degrees)`	`sim/flightmodel/position/latitude`
Aircraft longitude (deg)	`PLANE LONGITUDE (degrees)`	`sim/flightmodel/position/longitude`
Magnetic variation, + east (magnetic = true - variation) (deg)	`MAGVAR (degrees)`	`sim/flightmodel/position/magnetic_variation`

Sends

When you…	MSFS	X-Plane
Knob on COM, swap, recall entries into the standby; com2 on NAV/COM 2	`COM_STBY_RADIO_SET_HZCOM_STBY_RADIO_SWAP`	`sim/cockpit2/radios/actuators/com1_standby_frequency_hz_833sim/radios/com1_standy_flip`
Knob on NAV, swap, NAV recall entries; nav2 on NAV/COM 2	`NAV1_STBY_SET_HZNAV1_RADIO_SWAP`	`sim/cockpit2/radios/actuators/nav1_standby_frequency_hzsim/radios/nav1_standy_flip`
Knob on the OBS page (NAV/COM 1); crs2 on NAV/COM 2	`VOR1_SET`	`sim/cockpit2/radios/actuators/nav1_obs_deg_mag_pilotsim/cockpit2/radios/actuators/hsi_obs_deg_mag_pilot (also, when HSI_source_select_pilot == 0)`
OBS pressed again on the OBS page (NAV/COM 1); crs2Sync on NAV/COM 2	`VOR1_SET`	`sim/cockpit2/radios/actuators/nav1_obs_deg_mag_pilotsim/cockpit2/radios/actuators/hsi_obs_deg_mag_pilot (when HSI shows NAV1)`
ID to IDENT or back to off (the NAV 1 / NAV 2 audio bit)	`RADIO_VOR1_IDENT_TOGGLERADIO_VOR2_IDENT_TOGGLERADIO_DME1_IDENT_TOGGLERADIO_ADF_IDENT_TOGGLEMARKER_SOUND_TOGGLETOGGLE_SPEAKER`	`sim/cockpit2/radios/actuators/audio_selection_nav1sim/cockpit2/radios/actuators/audio_selection_nav2sim/cockpit2/radios/actuators/audio_dme_enabledsim/cockpit2/radios/actuators/audio_selection_adf1sim/cockpit2/radios/actuators/audio_marker_enabled`