New to rails, model design advice needed

Hi folks. Long time lurker, first time poster.

I am taking the plunge into learning rails by scratching a small itch
and creating a daily status board for the ambulance service I work
for. The daily briefing for a given day will look something like
this: http://test.adaptllc.com/stat/index.html

I've worked through a couple of excellent books on rails but I a still
a bit uncertain on the best way to lay out a model for this. So far,
considering each section as an object, I have:

daily_briefing
     fields: date, scas shift, fire shift, refs to included objects
for that day(?)
weather
     fields: hi, lo, chance rain / snow, cloudiness
our_staffing
     fields: vehicle, person1, person2
     has many: people
other_staffing
     fields: vehicle, person1, person2, in_service?
open_shifts
     fields: date, description
vehicles
     vehicle_number, location, issues
     has many: vehicles_issues
vehicles_issues
     vehicle, issue, date_resolved
     belongs to: vehicles
safety_msg
     fields: string
quarters
     fields: location, issue description, date resolved
trainings_meetings
     fields: date, time, location, description
special_events
     fields: date, start time, end time, location, description
road_closures
     fields: start date, end date, description
notes
     fields: kill date, description
people
     fields: last_name, first_name, certification, email

So, what is correct here? What is missing?

Also, what is the best way to take these individual objects and make
sure that the appropriate ones appear on the daily briefing for a
given day? I had thought to reference them in an object for that
date, but that seems a bit off.

Thanks.