The rules that use the vocabulary item "on" are:

<craft_message>

mark on deck

on top

<formation_mod>

on line

<display_verb>

turn on

<controller_flight_advisory>

standby for time on target

<nlb-not_command_or_system_utterance_or_user_response>

<marker_type> on the deck

<vector_purpose-cap>

on station

<damage_descriptor>

damaged on fire

disabled on fire

<on_prep>

on

<nlb-nlb7>

<marker_type> on the deck

<h_hour>

time on target

<zoom_operation-gapsout_null-gapsin_null>

zoom closer in on <zoomable_thing-gapsout_null-gapsin_null>

zoom in closer on <zoomable_thing-gapsout_null-gapsin_null>

zoom in on <zoomable_thing-gapsout_null-gapsin_null>

<center_operation-gapsout_null-gapsin_null>

center in on <zoomable_thing-gapsout_null-gapsin_null>

center on <zoomable_thing-gapsout_null-gapsin_null>

<nlb-not_careful-nlb7>

<marker_type> on the deck

<center_operation-gapsout_null-gapsin_np_gap>

center in on

center on

<proceed_verb>

go on

<vector_purpose>

on station

<h_hour-time_on_target>

time on target

<point_location_mod-gapsout_null-gapsin_null>

on <point_loc-gapsout_null-gapsin_null>

<on_order>

on command

on my command

on my order

on order

<communications_directive>

<radio_contact_verb> <controller> on <frequency_code>

<radio_contact_verb> <controller> on <frequency_code> prior to <point_name>