Please assess the completion status of the following clinical trial:

Trial Title: Test of Chamber Pressure to Divers and Chamber Attendants

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: None
- Time Perspective: None
- Masking: TRIPLE
- Phase: None
- Number of Arms: 4.0

Eligibility Criteria:
Inclusion Criteria:~* Adult, age 18 - 65 years~* Completion of medical history questionnaire without concerns identified for exposure to increased pressure~* Familiarity with atmospheric pressure change:~* Experienced and active hyperbaric chamber inside attendant: more than 50 hyperbaric compressions, with more than 4 have been in the last 4 months; or~* Experienced and active SCUBA diver: more than 20 lifetime compressed gas open water (not swimming pool) dives, with more than 10 in the last 12 months~* Able to equalize middle ear pressure easily~Exclusion Criteria:~* Pregnancy~* Known risk for barotrauma, as identified on the medical history questionnaire, such as:~* Recent (within 12 months) inner ear or sinus surgery~* Spontaneous pneumothorax~* Pulmonary cysts~* Emphysema~* Bullous lung disease~* Chronic obstructive pulmonary disease needing chronic active therapy~* Inability to tolerate chamber confinement or pressure~* Presence of heart failure~* Presence of any implanted electrical device, except hyperbaric-approved pacemakers~* Presence of middle-ear tympanostomy tubes

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 65 Years
- Healthy Volunteers: t

Study Arms:
- Sea Level Equivalent 1.2 atm abs (air) (Type: SHAM_COMPARATOR): Sham Chamber Session~Sea Level Equivalent 1.2 atm abs (2.6 psig) breathing regular air 20-chamber excursion
- Sea Level Equivalent 1.5 atm abs (O2) (Type: EXPERIMENTAL): Hyperbaric Oxygen (1.5 atm abs)~Sea Level Equivalent 1.5 atm abs (6.2 psig) breathing 100% oxygen 20-minute chamber excursion
- Altitude Equivalent 1.2 atm abs (air) (Type: SHAM_COMPARATOR): Sham Chamber Session~Altitude Equivalent 1.2 atm abs (5.1 psig) breathing regular air 20-minute chamber excursion
- Altitude Equivalent 1.5 atm abs (O2) (Type: EXPERIMENTAL): Hyperbaric Oxygen (1.5 atm abs)~Altitude Equivalent 1.5 atm abs (9.6 psig) breathing 100% oxygen 20-minute chamber excursion

Based on this trial design, predict the completion outcome and termination type (if applicable).