Ocean Technology Systems Spectrum - Communications; Anatomy of the Spectrum Full-Face Mask; Head Harness Assembly

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Anatomy of the Spectrum Full-Face Mask
Front Aspect
KEY:
1. Upper Lens Clamp
2. Lower Lens Clamp
3. Push-to-Talk (PTT)
Communications Port**
4. Drain Tab
5. Regulator Port
6. Inner Frame Port
7. Visor Drain Holes (located
inside mask)
8. Tempered Glass Visor
9. Accessory Attachment
Points
10. Accessory Attachment Point
11. Buckle (5 total)
Figure 1: Front of Mask
**Shown with communications PTT switch (not included)
1
2
3
6
4
10
5
8
9
7
11
Communications
In order to use underwater communications, an airspace is required to
allow for articulation and placement of a microphone. The Spectrum FFM
has an oral/nasal cavity that provides optimal communications, while
some FFMs have the nose separated from the mouth. This separation
alters the voice slightly, as in pinching your nose when talking and does
not achieve optimal underwater communications.
Figure 2: Five-Point Head
Harness
Head Harness Assembly
The Spectrum FFM uses a ve‑point
strapping system (Figure 2). Buckles are
mounted by a button securely on tabs that
are a part of the skirt. If needed, they are
replaced easily by stretching the tab and
either removing or replacing the button end
of the nylon buckle.