diff --git a/coordinator/config.lua b/coordinator/config.lua
index ccd8b04..983c7d9 100644
--- a/coordinator/config.lua
+++ b/coordinator/config.lua
@@ -6,19 +6,27 @@ config.SCADA_SV_PORT = 16100
 config.SCADA_SV_LISTEN = 16101
 -- listen port for SCADA coordinator API access
 config.SCADA_API_LISTEN = 16200
+
 -- expected number of reactor units, used only to require that number of unit monitors
 config.NUM_UNITS = 4
+
 -- graphics color
 config.RECOLOR = true
+
 -- alarm sounder volume (0.0 to 3.0, 1.0 being standard max volume, this is the option given to to speaker.play())
 -- note: alarm sine waves are at half saturation, so that multiple will be required to reach full scale
 config.SOUNDER_VOLUME = 1.0
+
+-- true for 24 hour time on main view screen
+config.TIME_24_HOUR = true
+
 -- log path
 config.LOG_PATH = "/log.txt"
 -- log mode
 --  0 = APPEND (adds to existing file on start)
 --  1 = NEW (replaces existing file on start)
 config.LOG_MODE = 0
+
 -- crypto config
 config.SECURE = true
 -- must be common between all devices
diff --git a/coordinator/coordinator.lua b/coordinator/coordinator.lua
index 5662cd6..9513b55 100644
--- a/coordinator/coordinator.lua
+++ b/coordinator/coordinator.lua
@@ -1,14 +1,12 @@
-local comms = require("scada-common.comms")
-local log   = require("scada-common.log")
-local ppm   = require("scada-common.ppm")
-local util  = require("scada-common.util")
+local comms       = require("scada-common.comms")
+local log         = require("scada-common.log")
+local ppm         = require("scada-common.ppm")
+local util        = require("scada-common.util")
 
 local apisessions = require("coordinator.apisessions")
 local iocontrol   = require("coordinator.iocontrol")
 
-local dialog = require("coordinator.ui.dialog")
-
-local coordinator = {}
+local dialog      = require("coordinator.ui.dialog")
 
 local print = util.print
 local println = util.println
@@ -22,6 +20,8 @@ local SCADA_MGMT_TYPES = comms.SCADA_MGMT_TYPES
 local SCADA_CRDN_TYPES = comms.SCADA_CRDN_TYPES
 local CRDN_COMMANDS = comms.CRDN_COMMANDS
 
+local coordinator = {}
+
 -- request the user to select a monitor
 ---@param names table available monitors
 ---@return boolean|string|nil
@@ -496,6 +496,8 @@ function coordinator.comms(version, modem, sv_port, sv_listen, api_listen, sv_wa
 
                                 -- log.debug("coord RTT = " .. trip_time .. "ms")
 
+                                iocontrol.get_db().facility.ps.publish("sv_ping", trip_time)
+
                                 _send_keep_alive_ack(timestamp)
                             else
                                 log.debug("SCADA keep alive packet length mismatch")
diff --git a/coordinator/iocontrol.lua b/coordinator/iocontrol.lua
index 76e10cc..08adbc2 100644
--- a/coordinator/iocontrol.lua
+++ b/coordinator/iocontrol.lua
@@ -18,6 +18,7 @@ local io = {}
 -- initialize the coordinator IO controller
 ---@param conf facility_conf configuration
 ---@param comms coord_comms comms reference
+---@diagnostic disable-next-line: redefined-local
 function iocontrol.init(conf, comms)
     io.facility = {
         scram = false,
diff --git a/coordinator/startup.lua b/coordinator/startup.lua
index db8c426..efc900e 100644
--- a/coordinator/startup.lua
+++ b/coordinator/startup.lua
@@ -15,10 +15,11 @@ local core         = require("graphics.core")
 local apisessions  = require("coordinator.apisessions")
 local config       = require("coordinator.config")
 local coordinator  = require("coordinator.coordinator")
+local iocontrol    = require("coordinator.iocontrol")
 local renderer     = require("coordinator.renderer")
 local sounder      = require("coordinator.sounder")
 
-local COORDINATOR_VERSION = "beta-v0.7.5"
+local COORDINATOR_VERSION = "beta-v0.7.6"
 
 local print = util.print
 local println = util.println
@@ -43,6 +44,7 @@ cfv.assert_port(config.SCADA_API_LISTEN)
 cfv.assert_type_int(config.NUM_UNITS)
 cfv.assert_type_bool(config.RECOLOR)
 cfv.assert_type_num(config.SOUNDER_VOLUME)
+cfv.assert_type_bool(config.TIME_24_HOUR)
 cfv.assert_type_str(config.LOG_PATH)
 cfv.assert_type_int(config.LOG_MODE)
 cfv.assert_type_bool(config.SECURE)
@@ -199,6 +201,8 @@ local function main()
     -- main event loop
     ----------------------------------------
 
+    local date_format = util.trinary(config.TIME_24_HOUR, "%X \x04 %A, %B %d %Y", "%r \x04 %A, %B %d %Y")
+
     local no_modem = false
 
     if ui_ok then
@@ -284,6 +288,9 @@ local function main()
                 -- free any closed sessions
                 --apisessions.free_all_closed()
 
+                -- update date and time string for main display
+                iocontrol.get_db().facility.ps.publish("date_time", os.date(date_format))
+
                 loop_clock.start()
             elseif conn_watchdog.is_timer(param1) then
                 -- supervisor watchdog timeout
diff --git a/coordinator/ui/layout/main_view.lua b/coordinator/ui/layout/main_view.lua
index b5fd744..16c114d 100644
--- a/coordinator/ui/layout/main_view.lua
+++ b/coordinator/ui/layout/main_view.lua
@@ -19,6 +19,8 @@ local TextBox       = require("graphics.elements.textbox")
 local PushButton    = require("graphics.elements.controls.push_button")
 local SwitchButton  = require("graphics.elements.controls.switch_button")
 
+local DataIndicator = require("graphics.elements.indicators.data")
+
 local TEXT_ALIGN = core.graphics.TEXT_ALIGN
 
 local cpair = core.graphics.cpair
@@ -26,42 +28,49 @@ local cpair = core.graphics.cpair
 -- create new main view
 ---@param monitor table main viewscreen
 local function init(monitor)
+    local facility = iocontrol.get_db().facility
+    local units = iocontrol.get_db().units
+
     local main = DisplayBox{window=monitor,fg_bg=style.root}
 
     -- window header message
-    local header = TextBox{parent=main,text="Nuclear Generation Facility SCADA Coordinator",alignment=TEXT_ALIGN.CENTER,height=1,fg_bg=style.header}
+    local header = TextBox{parent=main,y=1,text="Nuclear Generation Facility SCADA Coordinator",alignment=TEXT_ALIGN.CENTER,height=1,fg_bg=style.header}
+    local ping = DataIndicator{parent=main,x=1,y=1,label="SVTT",format="%d",value=0,unit="ms",lu_colors=cpair(colors.lightGray, colors.white),width=12,fg_bg=style.header}
+    -- max length example: "01:23:45 AM - Wednesday, September 28 2022"
+    local datetime = TextBox{parent=main,x=(header.width()-42),y=1,text="",alignment=TEXT_ALIGN.RIGHT,width=42,height=1,fg_bg=style.header}
 
-    local db = iocontrol.get_db()
+    facility.ps.subscribe("sv_ping", ping.update)
+    facility.ps.subscribe("date_time", datetime.set_value)
 
     local uo_1, uo_2, uo_3, uo_4    ---@type graphics_element
 
     local cnc_y_start = 3
 
     -- unit overviews
-    if db.facility.num_units >= 1 then
-        uo_1 = unit_overview(main, 2, 3, db.units[1])
+    if facility.num_units >= 1 then
+        uo_1 = unit_overview(main, 2, 3, units[1])
         cnc_y_start = cnc_y_start + uo_1.height() + 1
     end
 
-    if db.facility.num_units >= 2 then
-        uo_2 = unit_overview(main, 84, 3, db.units[2])
+    if facility.num_units >= 2 then
+        uo_2 = unit_overview(main, 84, 3, units[2])
     end
 
-    if db.facility.num_units >= 3 then
+    if facility.num_units >= 3 then
         -- base offset 3, spacing 1, max height of units 1 and 2
         local row_2_offset = 3 + 1 + math.max(uo_1.height(), uo_2.height())
 
-        uo_3 = unit_overview(main, 2, row_2_offset, db.units[3])
+        uo_3 = unit_overview(main, 2, row_2_offset, units[3])
         cnc_y_start = cnc_y_start + uo_3.height() + 1
 
-        if db.facility.num_units == 4 then
-            uo_4 = unit_overview(main, 84, row_2_offset, db.units[4])
+        if facility.num_units == 4 then
+            uo_4 = unit_overview(main, 84, row_2_offset, units[4])
         end
     end
 
     -- command & control
 
-    TextBox{parent=main,y=cnc_y_start,text=util.strrep("\x8c", header.width()),alignment=TEXT_ALIGN.CENTER,height=1,fg_bg=style.header}
+    TextBox{parent=main,y=cnc_y_start,text=util.strrep("\x8c", header.width()),alignment=TEXT_ALIGN.CENTER,height=1,fg_bg=cpair(colors.lightGray,colors.gray)}
 
     -- testing
     ---@fixme remove test code
diff --git a/graphics/elements/indicators/data.lua b/graphics/elements/indicators/data.lua
index 5ebc9cb..d19fab0 100644
--- a/graphics/elements/indicators/data.lua
+++ b/graphics/elements/indicators/data.lua
@@ -42,17 +42,26 @@ local function data(args)
     e.window.setCursorPos(1, 1)
     e.window.write(args.label)
 
-    local data_start = string.len(args.label) + 2
-    if string.len(args.label) == 0 then data_start = 1 end
+    local label_len = string.len(args.label)
+    local data_start = 1
+    local clear_width = args.width
+
+    if label_len > 0 then
+        data_start = data_start + (label_len + 1)
+        clear_width = args.width - (label_len + 1)
+    end
 
     -- on state change
     ---@param value any new value
     function e.on_update(value)
         e.value = value
 
-        local data_str = util.sprintf(args.format, value)
+        -- clear old data and label
+        e.window.setCursorPos(data_start, 1)
+        e.window.write(util.spaces(clear_width))
 
         -- write data
+        local data_str = util.sprintf(args.format, value)
         e.window.setCursorPos(data_start, 1)
         e.window.setTextColor(e.fg_bg.fgd)
         if args.commas then