RISQ Q3.28 requires procedures controlling mobile phone, internet, and email use on the bridge, restricting access generally to operationally necessary purposes (chart/publication updates, weather, navigational warnings, voyage-relevant information). What is the underlying safety rationale, beyond simply enforcing workplace discipline?

A. This restriction only applies during port stays, not while the vessel is at sea

B. The restriction exists purely to reduce data costs for the ship's satellite communication plan

C. Personal electronic devices are a documented source of attentional distraction directly implicated in real collision and grounding casualties — restricting bridge device use to operationally necessary purposes is a control against loss of situational awareness during watchkeeping, not a general conduct policy

D. Mobile phones interfere electromagnetically with all navigation equipment and must be banned for that reason alone

A. CATZOC and SCAMIN knowledge are tested by written exam only, never by live demonstration

B. ECDIS competency is assessed exclusively through the training certificate; demonstration is not part of RISQ

C. A certificate proves training was completed at some point, not that the officer retains functional competence with the specific equipment fitted on this vessel — RightShip's own guidance explicitly lists the functions to be demonstrated in front of the inspector because a paperwork-only check cannot distinguish genuine competence from a forgotten or never-applied skill

D. Live demonstration is only used when no training certificate exists onboard

A. BNWAS exists to detect watchkeeper incapacitation/absence, which is a real risk at anchor as well as underway — anchor watch failures (dragging anchor undetected, drifting into a shipping lane) have caused real casualties, so the alarm's value does not disappear just because the vessel is not making way

B. BNWAS is only legally required underway; the "at anchor" wording in RISQ is advisory and carries no inspection weight

C. BNWAS automatically disables itself at anchor by design, so this question only checks that the system correctly turns off

D. At anchor, the magnetic compass replaces the BNWAS function entirely