What are carriage requirements of Shipborne navigational equipment as per SOLAS?

Under SOLAS Chapter V, Regulation 12 (Shipborne Navigational Equipment), all ships are required to carry a minimum of navigational equipment, depending on their size – the larger the ship, the more equipment it should have.

2.1

All ships irrespective of size shall have:

2.1.1	a properly adjusted standard magnetic compass or other means, independent of any power supply to determine the ship’s heading and display the reading at the main steering position;
2.1.2	a pelorus or compass bearing device, or other means, independent of any power supply to take bearings over an arc of the horizon of 360°;
2.1.3	means of correcting heading and bearings to true at all times;
2.1.4	nautical charts and nautical publications to plan and display the ship’s route for the intended voyage and to plot and monitor positions throughout the voyage; an electronic chart display and information system (ECDIS) may be accepted as meeting the chart carriage requirements of this subparagraph;
2.1.5	back-up arrangements to meet the functional requirements of subparagraph .4, if this function is partly or fully fulfilled by electronic means;* * An appropriate folio of paper nautical charts may be used as a back-up arrangement for ECDIS. Other back-up arrangements for ECDIS are acceptable (see appendix 6 to resolution A.817(19), as amended).
2.1.6	a receiver for a global navigation satellite system or a terrestrial radio navigation system, or other means, suitable for use at all times throughout the intended voyage to establish and update the ship’s position by automatic means;
2.1.7	if less than 150 gross tonnage and if practicable, a radar reflector or other means, to enable detection by ships navigating by Radar at both 9 and 3 GHz;
2.1.8	when the ship’s bridge is totally enclosed and unless the Administration determines otherwise, a sound reception system, or other means, to enable the officer in charge of the navigational watch to hear sound signals and determine their direction;
2.1.9	a telephone, or other means, to communicate heading information to the emergency steering position, if provided.

2.2

All ships of 150 gross tonnage and upwards and passenger ships irrespective of size shall, in addition to the requirements of paragraph 2.1, be fitted with:

2.2.1

a spare magnetic compass interchangeable with the magnetic compass, as referred to in paragraph

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